From eec59f76e9010e22d5736cf1907af4a92067522e Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 6 Mar 2008 13:09:34 +0900 Subject: [PATCH] libata: allow LLDs w/o any reset method Some old SFF controllers don't have any way to reset the channel. Currently, this isn't supported and libata EH causes an oops. Allow LLDs w/o any reset method and just assume ATA class in such cases. Signed-off-by: Tejun Heo Signed-off-by: Ingo Molnar Signed-off-by: Jeff Garzik --- drivers/ata/libata-eh.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 698ce2cea52c..681252fd8143 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2150,6 +2150,15 @@ int ata_eh_reset(struct ata_link *link, int classify, ap->ops->set_piomode(ap, dev); } + if (!softreset && !hardreset) { + if (verbose) + ata_link_printk(link, KERN_INFO, "no reset method " + "available, skipping reset\n"); + if (!(lflags & ATA_LFLAG_ASSUME_CLASS)) + lflags |= ATA_LFLAG_ASSUME_ATA; + goto done; + } + /* Determine which reset to use and record in ehc->i.action. * prereset() may examine and modify it. */ @@ -2254,6 +2263,7 @@ int ata_eh_reset(struct ata_link *link, int classify, lflags |= ATA_LFLAG_ASSUME_ATA; } + done: ata_link_for_each_dev(dev, link) { /* After the reset, the device state is PIO 0 and the * controller state is undefined. Reset also wakes up -- 2.30.2