Johannes Berg [Wed, 20 Feb 2008 11:05:59 +0000 (12:05 +0100)]
rtl818x: fix sparse warnings
This silences a few sparse warnings. There are two more where
I can't follow the code.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Tue, 19 Feb 2008 16:46:48 +0000 (17:46 +0100)]
ssb: Fix pcicore cardbus mode
This fixes the pcicore driver to not die a horrible
crash death when inserting a cardbus card.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Tue, 19 Feb 2008 15:22:50 +0000 (16:22 +0100)]
ssb: Make the GPIO API reentrancy safe
This fixes the GPIO API to be reentrancy safe.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Tue, 19 Feb 2008 13:53:35 +0000 (14:53 +0100)]
ssb: Fix the GPIO API
This fixes the GPIO API to be usable.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Tue, 19 Feb 2008 11:41:30 +0000 (12:41 +0100)]
ssb: Fix watchdog access for devices without a chipcommon
This fixes the SSB watchdog access for devices without a chipcommon.
These devices have the watchdog on the extif.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Mon, 18 Feb 2008 20:44:39 +0000 (21:44 +0100)]
ssb: Fix serial console on new bcm47xx devices
This fixes the baud settings for new devices
like the Linksys WRT350n.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
David Miller [Sat, 16 Feb 2008 00:08:59 +0000 (16:08 -0800)]
ath5k: Fix build warnings on some 64-bit platforms.
'u64' is not necessarily 'unsigned long long'
drivers/net/wireless/ath5k/base.c: In function 'ath5k_beacon_update_timers':
drivers/net/wireless/ath5k/base.c:2130: warning: format '%llx' expects type 'long long unsigned int', but argument 4 has type 'u64'
drivers/net/wireless/ath5k/base.c:2130: warning: format '%llx' expects type 'long long unsigned int', but argument 5 has type 'u64'
drivers/net/wireless/ath5k/base.c: In function 'ath5k_intr':
drivers/net/wireless/ath5k/base.c:2391: warning: format '%llx' expects type 'long long unsigned int', but argument 6 has type 'u64'
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Jiri Slaby [Fri, 15 Feb 2008 20:58:52 +0000 (21:58 +0100)]
WDEV, ath5k, don't return int from bool function
sparse sees int -> bool cast as an error:
hw.c:3754:10: warning: cast truncates bits from constant value (
ffffffea becomes 0)
Fix it by converting the rettype to int and check appropriately.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Nick Kossifidis <mickflemm@gmail.com>
Cc: Luis R. Rodriguez <mcgrof@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Jiri Slaby [Fri, 15 Feb 2008 20:58:51 +0000 (21:58 +0100)]
WDEV: ath5k, fix lock imbalance
Omitted lock causes sparse warning
drivers/net/wireless/ath5k/base.c:1682:1: warning: context imbalance in 'ath5k_tasklet_rx' - different lock contexts for basic block
Add the lock to the guilty fail path.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Cc: Luis R. Rodriguez <mcgrof@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
John W. Linville [Wed, 20 Feb 2008 20:06:02 +0000 (15:06 -0500)]
p54usb: add USB ID for Linksys WUSB54G ver 2
Based on report from Cavan Carroll <cavancarroll@hotmail.com>:
http://bugzilla.kernel.org/show_bug.cgi?id=9863
Cc: Cavan Carroll <cavancarroll@hotmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Ivo Couckuyt [Wed, 20 Feb 2008 19:58:00 +0000 (14:58 -0500)]
p54usb: add USB ID for Phillips CPWUA054
Retarget of an old patch against prism54usb in linux-wireless archive:
http://marc.info/?l=linux-wireless&m=
117449935810254&w=2
Cc: Ivo Couckuyt <iv0co@yahoo.co.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Denis V. Lunev [Wed, 20 Feb 2008 08:26:16 +0000 (00:26 -0800)]
[NETNS]: Namespace leak in pneigh_lookup.
release_net is missed on the error path in pneigh_lookup.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 20 Feb 2008 08:23:01 +0000 (00:23 -0800)]
[SCTP]: Pick up an orphaned sctp_sockets_allocated counter.
This counter is currently write-only.
Drawing an analogy with the similar tcp counter, I think
that this one should be pointed by the sockets_allocated
members of sctp_prot and sctpv6_prot.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Daniel Lezcano [Wed, 20 Feb 2008 08:21:47 +0000 (00:21 -0800)]
veth: fix dev refcount race
When deleting the veth driver, veth_close calls netif_carrier_off
for the two extremities of the network device. netif_carrier_off on
the peer device will fire an event and hold a reference on the peer
device. Just after, the peer is unregistered taking the rtnl_lock while
the linkwatch_event is scheduled. If __linkwatch_run_queue does not
occurs before the unregistering, unregister_netdevice will wait for
the dev refcount to reach zero holding the rtnl_lock and linkwatch_event
will wait for the rtnl_lock and hold the dev refcount.
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Matheos Worku [Wed, 20 Feb 2008 08:18:09 +0000 (00:18 -0800)]
[NIU]: More BMAC alt MAC address fixes.
From: Matheos Worku <Matheos.Worku@Sun.COM>
1) niu_enable_alt_mac() needs to be adjusted so that the mask
is computed properly for the BMAC case.
2) BMAC has 6 alt MAC addresses available, not 7.
Signed-off-by: David S. Miller <davem@davemloft.net>
Patrick McHardy [Wed, 20 Feb 2008 01:20:33 +0000 (17:20 -0800)]
[NETFILTER]: Use __u32 in struct nf_inet_addr
As reported by David Woodhouse <dwmw2@infradead.org>, using u_int32_t
in struct nf_inet_addr breaks the busybox build. Fix by using __u32.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jan Engelhardt [Wed, 20 Feb 2008 01:20:06 +0000 (17:20 -0800)]
[NETFILTER]: xt_iprange: fix subtraction-based comparison
The host address parts need to be converted to host-endian first
before arithmetic makes any sense on them.
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jan Engelhardt [Wed, 20 Feb 2008 01:19:44 +0000 (17:19 -0800)]
[NETFILTER]: xt_hashlimit: remove unneeded struct member
By allocating ->hinfo, we already have the needed indirection to cope
with the per-cpu xtables struct match_entry.
[Patrick: do this now before the revision 1 struct is used by userspace]
Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Robert P. J. Day [Wed, 20 Feb 2008 01:19:14 +0000 (17:19 -0800)]
[NETFILTER]: Make sure xt_policy.h is unifdef'ed.
Since the header file xt_policy.h tests __KERNEL__, it should be
unifdef'ed before exporting to userspace.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Joonwoo Park [Wed, 20 Feb 2008 01:18:47 +0000 (17:18 -0800)]
[NETFILTER]: Fix incorrect use of skb_make_writable
http://bugzilla.kernel.org/show_bug.cgi?id=9920
The function skb_make_writable returns true or false.
Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 20 Feb 2008 01:18:20 +0000 (17:18 -0800)]
[NETFILTER]: xt_u32: drop the actually unused variable from u32_match_it
The int ret variable is used only to trigger the BUG_ON() after
the skb_copy_bits() call, so check the call failure directly
and drop the variable.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Patrick McHardy [Wed, 20 Feb 2008 01:17:52 +0000 (17:17 -0800)]
[NETFILTER]: {ip,ip6,nfnetlink}_queue: fix SKB_LINEAR_ASSERT when mangling packet data
As reported by Tomas Simonaitis <tomas.simonaitis@gmail.com>,
inserting new data in skbs queued over {ip,ip6,nfnetlink}_queue
triggers a SKB_LINEAR_ASSERT in skb_put().
Going back through the git history, it seems this bug is present since
at least 2.6.12-rc2, probably even since the removal of
skb_linearize() for netfilter.
Linearize non-linear skbs through skb_copy_expand() when enlarging
them. Tested by Thomas, fixes bugzilla #9933.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Adrian Bunk [Wed, 20 Feb 2008 00:28:54 +0000 (16:28 -0800)]
ipv4/fib_hash.c: fix NULL dereference
Unless I miss a guaranteed relation between between "f" and
"new_fa->fa_info" this patch is required for fixing a NULL dereference
introduced by commit
a6501e080c318f8d4467679d17807f42b3a33cd5 ("[IPV4]
FIB_HASH: Reduce memory needs and speedup lookups") and spotted by the
Coverity checker.
Eric Dumazet says:
Hum, you are right, kmem_cache_free() doesnt allow a NULL
object, like kfree() does.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Adrian Bunk [Wed, 20 Feb 2008 00:25:30 +0000 (16:25 -0800)]
net/9p/trans_virtio.c: kmalloc() enough memory
The Coverity checker spotted that less memory than required was
allocated.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Thomas Graf [Wed, 20 Feb 2008 00:12:08 +0000 (16:12 -0800)]
[RTNL]: Add missing link netlink attribute policy definitions
IFLA_LINK is no longer a write-only attribute on the kernel side and
must thus be validated. Same goes for the newly introduced
IFLA_LINKINFO.
Fixes undefined behaviour if either of the attributes are not well
formed.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jorge Boncompte [DTI2] [Tue, 19 Feb 2008 22:17:04 +0000 (14:17 -0800)]
[NET]: Messed multicast lists after dev_mc_sync/unsync
Commit
a0a400d79e3dd7843e7e81baa3ef2957bdc292d0 ("[NET]: dev_mcast:
add multicast list synchronization helpers") from you introduced a new
field "da_synced" to struct dev_addr_list that is not properly
initialized to 0. So when any of the current users (8021q, macvlan,
mac80211) calls dev_mc_sync/unsync they mess the address list for both
devices.
The attached patch fixed it for me and avoid future problems.
Signed-off-by: Jorge Boncompte [DTI2] <jorge@dti2.net>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 19 Feb 2008 05:30:48 +0000 (21:30 -0800)]
[NIU]: Bump driver version and release date.
Signed-off-by: David S. Miller <davem@davemloft.net>
Matheos Worku [Tue, 19 Feb 2008 05:30:03 +0000 (21:30 -0800)]
[NIU]: Fix BMAC alternate MAC address indexing.
BMAC port alternate MAC address index needs to start at 1. Index 0 is
used for the main MAC address.
Signed-off-by: Matheos Worku <matheos.worku@sun.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Randy Dunlap [Tue, 19 Feb 2008 04:52:13 +0000 (20:52 -0800)]
net: fix kernel-doc warnings in header files
Add missing structure kernel-doc descriptions to sock.h & skbuff.h
to fix kernel-doc warnings.
(I think that Stephen H. sent a similar patch, but I can't find it.
I just want to kill the warnings, with either patch.)
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Tue, 19 Feb 2008 04:50:42 +0000 (20:50 -0800)]
[IPV6]: Use BUG_ON instead of if + BUG in fib6_del_route.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Denis V. Lunev [Tue, 19 Feb 2008 04:49:36 +0000 (20:49 -0800)]
[IPV6]: dst_entry leak in ip4ip6_err. (resend)
The result of the ip_route_output is not assigned to skb. This means that
- it is leaked
- possible OOPS below dereferrencing skb->dst
- no ICMP message for this case
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dave Young [Tue, 19 Feb 2008 04:45:41 +0000 (20:45 -0800)]
bluetooth: do not move child device other than rfcomm
hci conn child devices other than rfcomm tty should not be moved here.
This is my lost, thanks for Barnaby's reporting and testing.
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dave Young [Tue, 19 Feb 2008 04:44:01 +0000 (20:44 -0800)]
bluetooth: put hci dev after del conn
Move hci_dev_put to del_conn to avoid hci dev going away before hci conn.
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 19 Feb 2008 00:50:22 +0000 (16:50 -0800)]
[NET]: Elminate spurious print_mac() calls.
Patrick McHardy notes that print_mac() can get invoked
even if the result it unused (f.e. as an argument to
pr_debug() when DEBUG is not defined).
Mark this function as "__pure" to eliminate this problem.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 18 Feb 2008 08:20:50 +0000 (00:20 -0800)]
[BLUETOOTH] hci_sysfs.c: Kill build warning.
net/bluetooth/hci_sysfs.c: In function ‘del_conn’:
net/bluetooth/hci_sysfs.c:339: warning: suggest parentheses around assignment used as truth value
Signed-off-by: David S. Miller <davem@davemloft.net>
Joe Perches [Mon, 18 Feb 2008 07:35:28 +0000 (23:35 -0800)]
[NET]: Remove MAC_FMT
MAC_FMT is no longer used
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Joe Perches [Mon, 18 Feb 2008 07:34:54 +0000 (23:34 -0800)]
net/8021q/vlan_dev.c: Use print_mac.
Remove direct use of MAC_FMT
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
YOSHIFUJI Hideaki [Mon, 18 Feb 2008 07:29:30 +0000 (23:29 -0800)]
[XFRM]: Fix ordering issue in xfrm_dst_hash_transfer().
Keep ordering of policy entries with same selector in
xfrm_dst_hash_transfer().
Issue should not appear in usual cases because multiple policy entries
with same selector are basically not allowed so far. Bug was pointed
out by Sebastien Decugis <sdecugis@hongo.wide.ad.jp>.
We could convert bydst from hlist to list and use list_add_tail()
instead.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: Sebastien Decugis <sdecugis@hongo.wide.ad.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
S.Çağlar Onur [Mon, 18 Feb 2008 07:25:57 +0000 (23:25 -0800)]
[BLUETOOTH] net/bluetooth/hci_core.c: Use time_* macros
The functions time_before, time_before_eq, time_after, and
time_after_eq are more robust for comparing jiffies against other
values.
So following patch implements usage of the time_after() macro, defined
at linux/jiffies.h, which deals with wrapping correctly
Signed-off-by: S.Çağlar Onur <caglar@pardus.org.tr>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Wang Chen [Mon, 18 Feb 2008 06:34:53 +0000 (22:34 -0800)]
[IPV6]: Fix hardcoded removing of old module code
Rusty hardcoded the old module code.
We can remove it now.
Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Mon, 18 Feb 2008 06:33:57 +0000 (22:33 -0800)]
[NETLABEL]: Move some initialization code into __init section.
Everything that is called from netlbl_init() can be marked with
__init. This moves 620 bytes from .text section to .text.init one.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Mon, 18 Feb 2008 06:33:16 +0000 (22:33 -0800)]
[NETLABEL]: Shrink the genl-ops registration code.
Turning them to array and registration in a loop saves
80 lines of code and ~300 bytes from text section.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jarek Poplawski [Mon, 18 Feb 2008 06:31:19 +0000 (22:31 -0800)]
[AX25] ax25_out: check skb for NULL in ax25_kick()
According to some OOPS reports ax25_kick tries to clone NULL skbs
sometimes. It looks like a race with ax25_clear_queues(). Probably
there is no need to add more than a simple check for this yet.
Another report suggested there are probably also cases where ax25
->paclen == 0 can happen in ax25_output(); this wasn't confirmed
during testing but let's leave this debugging check for some time.
Reported-and-tested-by: Jann Traschewski <jann@gmx.de>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Kris Katterjohn [Mon, 18 Feb 2008 06:29:19 +0000 (22:29 -0800)]
[TCP]: Fix tcp_v4_send_synack() comment
Signed-off-by: Kris Katterjohn <katterjohn@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Uwe Kleine-Koenig [Mon, 18 Feb 2008 06:28:32 +0000 (22:28 -0800)]
[IPV4]: fix alignment of IP-Config output
Make the indented lines aligned in the output (not in the code).
Signed-off-by: Uwe Kleine-Koenig <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Matti Linnanvuori [Mon, 18 Feb 2008 06:21:04 +0000 (22:21 -0800)]
Documentation: fix tcp.txt
Replace BIC with CUBIC as default congestion control. Fix grammar.
Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Julia Lawall [Mon, 18 Feb 2008 02:42:53 +0000 (18:42 -0800)]
net/9p/trans_virtio.c: Use BUG_ON
if (...) BUG(); should be replaced with BUG_ON(...) when the test has no
side-effects to allow a definition of BUG_ON that drops the code completely.
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@ disable unlikely @ expression E,f; @@
(
if (<... f(...) ...>) { BUG(); }
|
- if (unlikely(E)) { BUG(); }
+ BUG_ON(E);
)
@@ expression E,f; @@
(
if (<... f(...) ...>) { BUG(); }
|
- if (E) { BUG(); }
+ BUG_ON(E);
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Julia Lawall [Mon, 18 Feb 2008 02:42:03 +0000 (18:42 -0800)]
net/rxrpc: Use BUG_ON
if (...) BUG(); should be replaced with BUG_ON(...) when the test has no
side-effects to allow a definition of BUG_ON that drops the code completely.
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@ disable unlikely @ expression E,f; @@
(
if (<... f(...) ...>) { BUG(); }
|
- if (unlikely(E)) { BUG(); }
+ BUG_ON(E);
)
@@ expression E,f; @@
(
if (<... f(...) ...>) { BUG(); }
|
- if (E) { BUG(); }
+ BUG_ON(E);
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 18 Feb 2008 02:39:54 +0000 (18:39 -0800)]
Revert "[NDISC]: Fix race in generic address resolution"
This reverts commit
69cc64d8d92bf852f933e90c888dfff083bd4fc9.
It causes recursive locking in IPV6 because unlike other
neighbour layer clients, it even needs neighbour cache
entries to send neighbour soliciation messages :-(
We'll have to find another way to fix this race.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Mon, 18 Feb 2008 02:35:07 +0000 (18:35 -0800)]
Revert "[RTNETLINK]: Send a single notification on device state changes."
This reverts commit
45b503548210fe6f23e92b856421c2a3f05fd034.
It break locking around dev->link_mode as well as cause
other bootup problems.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 15 Feb 2008 23:59:19 +0000 (15:59 -0800)]
Merge branch 'upstream-davem' of /linux/kernel/git/jgarzik/netdev-2.6
David S. Miller [Fri, 15 Feb 2008 23:56:47 +0000 (15:56 -0800)]
Merge branch 'fixes' of /linux/kernel/git/linville/wireless-2.6
Stefano Brivio [Sat, 9 Feb 2008 06:20:43 +0000 (07:20 +0100)]
b43legacy: Add driver load messages
This adds printk messages with basic information about the driver being loaded.
This information includes a summary of the compiled-in features, which
simplifies bug-reporting and debugging a lot.
Also a firmware ID is printed. This is a unique identifier blob for a specific
version of the firmware. This ID is attached to a specific version of the firmware
blob in b43-fwcutter (see fwcutter git).
This helps users to select the right firmware for their device.
This also makes it possible to use automated scripts to fetch and extract the right
firmware for the driver. (The script will grep the .ko for the "Firmware-ID: xxx" string.)
While the driver might still support other versions of the firmware for backward
compatibility, this will always print out the officially supported version, which
people _should_ use.
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Dan Williams [Thu, 14 Feb 2008 22:49:41 +0000 (17:49 -0500)]
ipw2200: fix ucode assertion for RX queue overrun
Restock the RX queue when there are a lot of unused frames so that the
RX ring buffer doesn't overrun, causing a ucode assertion. Backport of
patch "iwlwifi: fix ucode assertion for RX queue overrun".
Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reinette Chatre [Thu, 14 Feb 2008 18:40:28 +0000 (10:40 -0800)]
iwlwifi: only check for association id when associating with AP
There is no association process in IBSS mode - so testing the
association id is not needed.
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
CC: Richard Scherping <richard@scherping.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tomas Winkler [Wed, 13 Feb 2008 00:47:54 +0000 (02:47 +0200)]
iwlwifi: reverting 'misc wireless annotations' patch for iwlwifi
This patch revert commit blow that wrongly suppressed sparse warning in
iwlwifi eeprom reading
In addtion it suppresses correctly the iwlwifi eeprom register reading anomaly.
commit
45883ae47a0a4700c0f4716dc75a255cccdc3a76
misc wireless annotations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Stefano Brivio [Tue, 12 Feb 2008 02:09:10 +0000 (03:09 +0100)]
b43legacy: fix firmware load message level
The firmware version information should always get printed. Not only on a
debug build.
The patch by Michael Buesch has been ported to b43legacy.
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Stefano Brivio [Tue, 12 Feb 2008 02:09:00 +0000 (03:09 +0100)]
b43legacy: add firmware information to modinfo
This adds the firmware ID to modinfo.
The patch by Michael Buesch has been ported to b43legacy.
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Sun, 10 Feb 2008 13:16:52 +0000 (14:16 +0100)]
mac80211: Fix initial hardware configuration
On the initial device-open we need to defer the hardware reconfiguration
after we incremented the open_count, because the hw_config checks this flag
and won't call the lowlevel driver in case it is zero.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Ivo van Doorn [Sun, 10 Feb 2008 10:21:57 +0000 (11:21 +0100)]
rt2x00: Add new USB ID to rt2500usb
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Sat, 9 Feb 2008 16:53:41 +0000 (17:53 +0100)]
b43: Fix firmware load message level
The firmware version information should always get printed. Not only
on a debug build.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Sat, 9 Feb 2008 09:23:49 +0000 (10:23 +0100)]
b43: Add firmware information to modinfo
This adds the firmware ID to modinfo.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Michael Buesch [Fri, 8 Feb 2008 23:18:35 +0000 (00:18 +0100)]
b43: Add driver load messages
This adds printk messages with basic information about the driver being loaded.
This information includes a summary of the compiled-in features, which
simplifies bug-reporting and debugging a lot.
Also a firmware ID is printed. This is a unique identifier blob for a specific
version of the firmware. This ID is attached to a specific version of the firmware
blob in b43-fwcutter (see fwcutter git).
This helps users to select the right firmware for their device.
This also makes it possible to use automated scripts to fetch and extract the right
firmware for the driver. (the script will grep the .ko for the "Firmware-ID: xxx" string.
While the driver might still support other versions of the firmware for backward
compatibility, this will always print out the officially supported version, which
people _should_ use.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Stefano Brivio [Fri, 8 Feb 2008 05:31:53 +0000 (06:31 +0100)]
b43legacy: fix DMA for 30/32-bit DMA engines
This checks if the DMA address is bigger than what the controller can manage.
It will reallocate the buffers in the GFP_DMA zone in that case.
The patch by Michael Buesch has been ported to b43legacy.
Thanks to Matti Viljanen for reporting this.
Cc: Matti Viljanen <viljanen.matti@gmail.com>
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Mohamed Abbas [Thu, 7 Feb 2008 21:16:33 +0000 (13:16 -0800)]
iwlwifi: earlier rx allocation
Value of count is used to decide when to replenish rx buffers. If it is
equal or above 8 we replenish the buffers. Ensure there is no starvation
by initializing count to 8 - thus forcing replenish at first iteration.
This is helpful when rx receives batches of buffers smaller than 8.
Signed-off-by: Mohamed Abbas <mabbas@linux.intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Gregory Greenman [Wed, 6 Feb 2008 19:20:40 +0000 (11:20 -0800)]
iwlwifi: Don't send host commands on rfkill
This patch prevents sending host commands when rfkill is on
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reinette Chatre [Wed, 6 Feb 2008 19:20:38 +0000 (11:20 -0800)]
iwlwifi: do not clear GEO_CONFIGURED bit when calling _down
The geos information is set up during probe and should only
be removed during pci_remove, not during _down.
This is a temporary fix until the setting of the status bits
have been cleaned up (to explicitly match all setting with
clearing of status bits).
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Jussi Kivilinna [Wed, 6 Feb 2008 13:36:10 +0000 (15:36 +0200)]
rndis_wlan: enable stall workaround by link quality instead of link speed
Enable workaround for poor link stalls by link quality instead of link
speed. Using link speed caused workaround be active always on 802.11b
networks which reduced performance and not even catch all stalls.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Bruno Randolf [Tue, 5 Feb 2008 09:44:55 +0000 (18:44 +0900)]
ath5k: correct padding in tx descriptors
when setting up the tx descriptors for the hardware we must account for any
padding between the header and the data we might have added previously. frame
len is the length of the frame in the air (including FCS but no padding) and
buffer len is the length of the buffer (including padding, but without FCS).
changing the way ah_setup_tx_desc is called: now excluding the FCS, since it's
easier to add that in the function where we need it.
before this fix we sent trailing zero bytes after the packet (because frame len
included the padding) which was not a big problem without WEP, but with WEP
this resultes in a wrong WEP checksum and the packet is discarded - which is
how i noticed at all ;)
an easy way to run into header padding problems, btw, is to connect to a QoS
(WME) enabled access point (eg. madwifi) - QoS data frames are 2 byte longer
and will require padding.
this patch applies on top of luis latest patch series from 04.02.2008.
drivers/net/wireless/ath5k/base.c: Changes-licensed-under: 3-Clause-BSD
drivers/net/wireless/ath5k/hw.c: Changes-licensed-under: ISC
Signed-off-by: Bruno Randolf <bruno@thinktube.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
John W. Linville [Thu, 7 Feb 2008 20:46:01 +0000 (15:46 -0500)]
wavelan: mark hardware interfacing structures as packed
With assists from Russell King <rmk+kernel@arm.linux.org.uk> and
Andrew Morton <akpm@linux-foundation.org>...
Signed-off-by: John W. Linville <linville@tuxdriver.com>
David Graham [Thu, 14 Feb 2008 18:17:20 +0000 (10:17 -0800)]
e1000e: PCIe devices do not need to unset MANC_ARP_ENA
Users reported that ARP's were lost with e1000e. The problem
is fixed by not enabling this manageability configuration
bit.
None of the release_manageability code is actually needed as the
normal device reset during a shutdown returns everthing to
the right condition automatically.
Signed-off-by: David Graham <david.graham@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
David Graham [Thu, 14 Feb 2008 18:17:12 +0000 (10:17 -0800)]
igb: PCIe devices do not need to unset MANC_ARP_ENA
Users reported that ARP's were lost with igb. The problem
is fixed by not enabling this manageability configuration
bit.
None of the release_manageability code is actually needed as the
normal device reset during a shutdown returns everthing to
the right condition automatically.
Signed-off-by: David Graham <david.graham@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Auke Kok [Tue, 12 Feb 2008 23:20:33 +0000 (15:20 -0800)]
ixgbe: Correctly obtain protocol information on transmit
In reply to "RE: [Fwd: [PATCH 2.6.25] ixgbe/igb: correctly obtain protocol
information on transmit]" from Andy Gospodarek:
The driver was incorrectly looking at socket headers for
protocol information, needed for checksumming offload. Fix
this by not looking at the socket but frame headers instead.
This disregards extension headers but it's unclear that linux
generates those anyway.
Tested by Andy Gospodarek.
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Auke Kok [Tue, 12 Feb 2008 23:20:24 +0000 (15:20 -0800)]
e1000e: Fix CRC stripping in hardware context bug
CRC stripping was only correctly enabled for packet split recieves
which is used when receiving jumbo frames. Correctly enable SECRC
also for normal buffer packet receives.
Tested by Andy Gospodarek and Johan Andersson, see bugzilla #9940.
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Al Viro [Wed, 13 Feb 2008 03:58:36 +0000 (03:58 +0000)]
gianfar iomem misannotations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Jarek Poplawski [Wed, 13 Feb 2008 11:17:58 +0000 (11:17 +0000)]
mkiss: ax_bump() locking fix
According to one of OOPSes reported by Jann softirq can break
while skb is prepared for netif_rx. The report isn't complete,
so the real reason of the later bug could be different, but
IMHO this locking break in ax_bump is unsafe and unnecessary.
Reported-and-tested-by: Jann Traschewski <jann@gmx.de>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Chuck Ebbert [Thu, 14 Feb 2008 00:47:11 +0000 (19:47 -0500)]
Fix station address detection in smc
Megahertz EM1144 PCMCIA ethernet adapter needs special handling
because it has two VERS_1 tuples and the station address is in
the second one. Conversion to generic handling of these fields
broke it. Reverting that fixes the device.
https://bugzilla.redhat.com/show_bug.cgi?id=233255
Thanks go to Jon Stanley for not giving up on this one until the
problem was found.
Signed-off-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Rémi Denis-Courmont [Fri, 15 Feb 2008 10:35:45 +0000 (02:35 -0800)]
[NET]: Make sure sockets implement splice_read
Fixes a segmentation fault when trying to splice from a non-TCP socket.
Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Keiichi KII [Fri, 15 Feb 2008 10:01:58 +0000 (02:01 -0800)]
netconsole: avoid null pointer dereference at show_local_mac()
This patch avoids a null pointer dereference when we read local_mac
for netconsole in configfs and shows default local mac address
value.
A null pointer dereference occurs when we call show_local_mac() via
local_mac entry in configfs before we setup the content of netpoll
using netpoll_setup().
Signed-off-by: Keiichi KII <k-keiichi@bx.jp.nec.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Herbert Xu [Fri, 15 Feb 2008 07:49:37 +0000 (23:49 -0800)]
[IPV6]: Fix reversed local_df test in ip6_fragment
I managed to reverse the local_df test when forward-porting this
patch so it actually makes things worse by never fragmenting at
all.
Thanks to David Stevens for testing and reporting this bug.
Bill Fink pointed out that the local_df setting is also the wrong
way around.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
YOSHIFUJI Hideaki [Thu, 14 Feb 2008 22:52:38 +0000 (14:52 -0800)]
[XFRM]: Avoid bogus BUG() when throwing new policy away.
From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
When we destory a new policy entry, we need to tell
xfrm_policy_destroy() explicitly that the entry is not
alive yet.
Signed-off-by: David S. Miller <davem@davemloft.net>
Kazunori MIYAZAWA [Thu, 14 Feb 2008 22:51:38 +0000 (14:51 -0800)]
[AF_KEY]: Fix bug in spdadd
This patch fix a BUG when adding spds which have same selector.
Signed-off-by: Kazunori MIYAZAWA <kazunori@miyazawa.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jozsef Kadlecsik [Thu, 14 Feb 2008 22:50:21 +0000 (14:50 -0800)]
[NETFILTER] nf_conntrack_proto_tcp.c: Mistyped state corrected.
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Mundt [Thu, 14 Feb 2008 22:48:45 +0000 (14:48 -0800)]
net: xfrm statistics depend on INET
net/built-in.o: In function `xfrm_policy_init':
/home/pmundt/devel/git/sh-2.6.25/net/xfrm/xfrm_policy.c:2338: undefined reference to `snmp_mib_init'
snmp_mib_init() is only built in if CONFIG_INET is set.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Adrian Bunk [Thu, 14 Feb 2008 01:41:39 +0000 (17:41 -0800)]
[NETFILTER]: make secmark_tg_destroy() static
This patch makes the needlessly global secmark_tg_destroy() static.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Adrian Bunk [Thu, 14 Feb 2008 01:40:25 +0000 (17:40 -0800)]
[INET]: Unexport inet_listen_wlock
This patch removes the no longer used EXPORT_SYMBOL(inet_listen_wlock).
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Adrian Bunk [Thu, 14 Feb 2008 01:39:34 +0000 (17:39 -0800)]
[INET]: Unexport __inet_hash_connect
This patch removes the unused EXPORT_SYMBOL_GPL(__inet_hash_connect).
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Neil Turton [Wed, 13 Feb 2008 07:13:48 +0000 (23:13 -0800)]
[NET]: Improve cache line coherency of ingress qdisc
Move the ingress qdisc members of struct net_device from the transmit
cache line to the receive cache line to avoid cache line ping-pong.
These members are only used on the receive path.
Signed-off-by: Neil Turton <nturton@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Matti Linnanvuori [Wed, 13 Feb 2008 07:10:11 +0000 (23:10 -0800)]
[NET]: Fix race in dev_close(). (Bug 9750)
There is a race in Linux kernel file net/core/dev.c, function dev_close.
The function calls function dev_deactivate, which calls function
dev_watchdog_down that deletes the watchdog timer. However, after that, a
driver can call netif_carrier_ok, which calls function
__netdev_watchdog_up that can add the watchdog timer again. Function
unregister_netdevice calls function dev_shutdown that traps the bug
!timer_pending(&dev->watchdog_timer). Moving dev_deactivate after
netif_running() has been cleared prevents function netif_carrier_on
from calling __netdev_watchdog_up and adding the watchdog timer again.
Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Herbert Xu [Wed, 13 Feb 2008 06:50:35 +0000 (22:50 -0800)]
[IPSEC]: Fix bogus usage of u64 on input sequence number
Al Viro spotted a bogus use of u64 on the input sequence number which
is big-endian. This patch fixes it by giving the input sequence number
its own member in the xfrm_skb_cb structure.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Laszlo Attila Toth [Wed, 13 Feb 2008 06:42:09 +0000 (22:42 -0800)]
[RTNETLINK]: Send a single notification on device state changes.
In do_setlink() a single notification is sent at the end of the
function if any modification occured. If the address has been changed,
another notification is sent.
Both of them is required because originally only the NETDEV_CHANGEADDR
notification was sent and although device state change implies address
change, some programs may expect the original notification. It remains
for compatibity.
If set_operstate() is called from do_setlink(), it doesn't send a
notification, only if it is called from rtnl_create_link() as earlier.
Signed-off-by: Laszlo Attila Toth <panther@balabit.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 13 Feb 2008 06:38:06 +0000 (22:38 -0800)]
[NETLABLE]: Hide netlbl_unlabel_audit_addr6 under ifdef CONFIG_IPV6.
This one is called from under this config only, so move
it in the same place.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 13 Feb 2008 06:37:19 +0000 (22:37 -0800)]
[NETLABEL]: Don't produce unused variables when IPv6 is off.
Some code declares variables on the stack, but uses them
under #ifdef CONFIG_IPV6, so thay become unused when ipv6
is off. Fortunately, they are used in a switch's case
branches, so the fix is rather simple.
Is it OK from coding style POV to add braces inside "cases",
or should I better avoid such style and rework the patch?
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 13 Feb 2008 06:35:37 +0000 (22:35 -0800)]
[NETLABEL]: Compilation for CONFIG_AUDIT=n case.
The audit_log_start() will expand into an empty do { } while (0)
construction and the audit_ctx becomes unused.
The solution: push current->audit_context into audit_log_start()
directly, since it is not required in any other place in the
calling function.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 13 Feb 2008 06:16:33 +0000 (22:16 -0800)]
[GENETLINK]: Relax dances with genl_lock.
The genl_unregister_family() calls the genl_unregister_mc_groups(),
which takes and releases the genl_lock and then locks and releases
this lock itself.
Relax this behavior, all the more so the genl_unregister_mc_groups()
is called from genl_unregister_family() only.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pavel Emelyanov [Wed, 13 Feb 2008 06:15:14 +0000 (22:15 -0800)]
[NETLABEL]: Fix lookup logic of netlbl_domhsh_search_def.
Currently, if the call to netlbl_domhsh_search succeeds the
return result will still be NULL.
Fix that, by returning the found entry (if any).
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rami Rosen [Wed, 13 Feb 2008 06:06:53 +0000 (22:06 -0800)]
[IPV6]: remove unused method declaration (net/ndisc.h).
This patch removes unused declaration of dflt_rt_lookup() method in
include/net/ndisc.h
Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Urs Thuermann [Wed, 13 Feb 2008 06:03:25 +0000 (22:03 -0800)]
[NET]: Fix comment for skb_pull_rcsum
Fix comment for skb_pull_rcsum
Signed-off-by: Urs Thuermann <urs@isnogud.escape.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Herbert Xu [Wed, 13 Feb 2008 02:07:27 +0000 (18:07 -0800)]
[IPV6]: Fix IPsec datagram fragmentation
This is a long-standing bug in the IPsec IPv6 code that breaks
when we emit a IPsec tunnel-mode datagram packet. The problem
is that the code the emits the packet assumes the IPv6 stack
will fragment it later, but the IPv6 stack assumes that whoever
is emitting the packet is going to pre-fragment the packet.
In the long term we need to fix both sides, e.g., to get the
datagram code to pre-fragment as well as to get the IPv6 stack
to fragment locally generated tunnel-mode packet.
For now this patch does the second part which should make it
work for the IPsec host case.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 12 Feb 2008 05:45:44 +0000 (21:45 -0800)]
[NDISC]: Fix race in generic address resolution
Frank Blaschka provided the bug report and the initial suggested fix
for this bug. He also validated this version of this fix.
The problem is that the access to neigh->arp_queue is inconsistent, we
grab references when dropping the lock lock to call
neigh->ops->solicit() but this does not prevent other threads of
control from trying to send out that packet at the same time causing
corruptions because both code paths believe they have exclusive access
to the skb.
The best option seems to be to hold the write lock on neigh->lock
during the ->solicit() call. I looked at all of the ndisc_ops
implementations and this seems workable. The only case that needs
special care is the IPV4 ARP implementation of arp_solicit(). It
wants to take neigh->lock as a reader to protect the header entry in
neigh->ha during the emission of the soliciation. We can simply
remove the read lock calls to take care of that since holding the lock
as a writer at the caller providers a superset of the protection
afforded by the existing read locking.
The rest of the ->solicit() implementations don't care whether the
neigh is locked or not.
Signed-off-by: David S. Miller <davem@davemloft.net>