From: Jeff Garzik Date: Sat, 28 May 2005 11:55:48 +0000 (-0400) Subject: [SCSI] allow sleeping in ->eh_device_reset_handler() X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=94d0e7b805961c44e4dc486ffc21075084bb7175;p=openwrt%2Fstaging%2Fblogic.git [SCSI] allow sleeping in ->eh_device_reset_handler() Signed-off-by: James Bottomley --- diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt index f4a37ee670f2..62f7f76f5de8 100644 --- a/Documentation/scsi/scsi_mid_low_api.txt +++ b/Documentation/scsi/scsi_mid_low_api.txt @@ -973,8 +973,7 @@ Details: * * Returns SUCCESS if command aborted else FAILED * - * Locks: struct Scsi_Host::host_lock held (with irqsave) on entry - * and assumed to be held on return. + * Locks: None held * * Calling context: kernel thread * diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c index de552486b1c9..fcfddcc8e7ba 100644 --- a/drivers/ieee1394/sbp2.c +++ b/drivers/ieee1394/sbp2.c @@ -2615,7 +2615,7 @@ static int sbp2scsi_abort(struct scsi_cmnd *SCpnt) /* * Called by scsi stack when something has really gone wrong. */ -static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) +static int __sbp2scsi_reset(struct scsi_cmnd *SCpnt) { struct scsi_id_instance_data *scsi_id = (struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0]; @@ -2630,6 +2630,18 @@ static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) return(SUCCESS); } +static int sbp2scsi_reset(struct scsi_cmnd *SCpnt) +{ + unsigned long flags; + int rc; + + spin_lock_irqsave(SCpnt->device->host->host_lock, flags); + rc = __sbp2scsi_reset(SCpnt); + spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags); + + return rc; +} + static const char *sbp2scsi_info (struct Scsi_Host *host) { return "SCSI emulation for IEEE-1394 SBP-2 Devices"; diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c index 6a5851c51a21..82cd9bc3b024 100644 --- a/drivers/message/fusion/mptscsih.c +++ b/drivers/message/fusion/mptscsih.c @@ -1801,7 +1801,6 @@ int mptscsih_dev_reset(struct scsi_cmnd * SCpnt) { MPT_SCSI_HOST *hd; - spinlock_t *host_lock = SCpnt->device->host->host_lock; /* If we can't locate our host adapter structure, return FAILED status. */ @@ -1818,7 +1817,6 @@ mptscsih_dev_reset(struct scsi_cmnd * SCpnt) printk(KERN_WARNING MYNAM ": %s: >> Attempting target reset! (sc=%p)\n", hd->ioc->name, SCpnt); - spin_unlock_irq(host_lock); if (mptscsih_TMHandler(hd, MPI_SCSITASKMGMT_TASKTYPE_TARGET_RESET, SCpnt->device->channel, SCpnt->device->id, 0, 0, 5 /* 5 second timeout */) @@ -1830,12 +1828,10 @@ mptscsih_dev_reset(struct scsi_cmnd * SCpnt) hd->ioc->name, SCpnt); hd->tmPending = 0; hd->tmState = TM_STATE_NONE; - spin_lock_irq(host_lock); return FAILED; } - spin_lock_irq(host_lock); - return SUCCESS; + return SUCCESS; } /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index 6e4447598495..be7c91d4ae8c 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -636,8 +636,6 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata; struct Scsi_Host *scsi_host = scpnt->device->host; - spin_unlock_irq(scsi_host->host_lock); - if (!unit) { ZFCP_LOG_NORMAL("bug: Tried reset for nonexistent unit\n"); retval = SUCCESS; @@ -680,7 +678,6 @@ zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt) retval = SUCCESS; } out: - spin_lock_irq(scsi_host->host_lock); return retval; } diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c index 88d119f4b970..630b11575230 100644 --- a/drivers/scsi/aha152x.c +++ b/drivers/scsi/aha152x.c @@ -1225,8 +1225,6 @@ static int aha152x_device_reset(Scsi_Cmnd * SCpnt) } DO_UNLOCK(flags); - - spin_lock_irq(shpnt->host_lock); return ret; } diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c index 7fc6c76e519b..31db0edc7cf9 100644 --- a/drivers/scsi/aic7xxx/aic79xx_osm.c +++ b/drivers/scsi/aic7xxx/aic79xx_osm.c @@ -1511,17 +1511,17 @@ ahd_linux_dev_reset(Scsi_Cmnd *cmd) ahd_name(ahd), cmd->device->channel, cmd->device->id, cmd->device->lun, cmd); #endif - ahd_midlayer_entrypoint_lock(ahd, &s); + ahd_lock(ahd, &s); dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id, cmd->device->lun, /*alloc*/FALSE); if (dev == NULL) { - ahd_midlayer_entrypoint_unlock(ahd, &s); + ahd_unlock(ahd, &s); kfree(recovery_cmd); return (FAILED); } if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) { - ahd_midlayer_entrypoint_unlock(ahd, &s); + ahd_unlock(ahd, &s); kfree(recovery_cmd); return (FAILED); } @@ -1570,7 +1570,7 @@ ahd_linux_dev_reset(Scsi_Cmnd *cmd) spin_lock_irq(&ahd->platform_data->spin_lock); ahd_schedule_runq(ahd); ahd_linux_run_complete_queue(ahd); - ahd_midlayer_entrypoint_unlock(ahd, &s); + ahd_unlock(ahd, &s); printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); return (retval); } diff --git a/drivers/scsi/aic7xxx_old.c b/drivers/scsi/aic7xxx_old.c index ee127e8aea55..1e83096bb911 100644 --- a/drivers/scsi/aic7xxx_old.c +++ b/drivers/scsi/aic7xxx_old.c @@ -10358,7 +10358,7 @@ aic7xxx_queue(Scsi_Cmnd *cmd, void (*fn)(Scsi_Cmnd *)) * Returns an enumerated type that indicates the status of the operation. *-F*************************************************************************/ static int -aic7xxx_bus_device_reset(Scsi_Cmnd *cmd) +__aic7xxx_bus_device_reset(Scsi_Cmnd *cmd) { struct aic7xxx_host *p; struct aic7xxx_scb *scb; @@ -10551,6 +10551,18 @@ aic7xxx_bus_device_reset(Scsi_Cmnd *cmd) return SUCCESS; } +static int +aic7xxx_bus_device_reset(Scsi_Cmnd *cmd) +{ + int rc; + + spin_lock_irq(cmd->device->host->host_lock); + rc = __aic7xxx_bus_device_reset(cmd); + spin_unlock_irq(cmd->device->host->host_lock); + + return rc; +} + /*+F************************************************************************* * Function: diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index d857842bc45b..d89b8eb3cdf3 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -976,9 +976,7 @@ static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd) return FAILED; } - spin_unlock_irq(hostdata->host->host_lock); wait_for_completion(&evt->comp); - spin_lock_irq(hostdata->host->host_lock); /* make sure we got a good response */ if (unlikely(srp_rsp.srp.generic.type != SRP_RSP_TYPE)) { diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c index f9c01a13abef..fd8af643feac 100644 --- a/drivers/scsi/ipr.c +++ b/drivers/scsi/ipr.c @@ -2916,7 +2916,7 @@ static int ipr_eh_host_reset(struct scsi_cmnd * scsi_cmd) * Return value: * SUCCESS / FAILED **/ -static int ipr_eh_dev_reset(struct scsi_cmnd * scsi_cmd) +static int __ipr_eh_dev_reset(struct scsi_cmnd * scsi_cmd) { struct ipr_cmnd *ipr_cmd; struct ipr_ioa_cfg *ioa_cfg; @@ -2970,6 +2970,17 @@ static int ipr_eh_dev_reset(struct scsi_cmnd * scsi_cmd) return (IPR_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS); } +static int ipr_eh_dev_reset(struct scsi_cmnd * cmd) +{ + int rc; + + spin_lock_irq(cmd->device->host->host_lock); + rc = __ipr_eh_dev_reset(cmd); + spin_unlock_irq(cmd->device->host->host_lock); + + return rc; +} + /** * ipr_bus_reset_done - Op done function for bus reset. * @ipr_cmd: ipr command struct diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index e9b84f9d8e81..13da26883da3 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -928,7 +928,7 @@ lpfc_abort_handler(struct scsi_cmnd *cmnd) } static int -lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) +__lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) { struct Scsi_Host *shost = cmnd->device->host; struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0]; @@ -1040,6 +1040,16 @@ out: return ret; } +static int +lpfc_reset_lun_handler(struct scsi_cmnd *cmnd) +{ + int rc; + spin_lock_irq(cmnd->device->host->host_lock); + rc = __lpfc_reset_lun_handler(cmnd); + spin_unlock_irq(cmnd->device->host->host_lock); + return rc; +} + /* * Note: midlayer calls this function with the host_lock held */ diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c index 8d707b29027d..80b0c40c522b 100644 --- a/drivers/scsi/megaraid.c +++ b/drivers/scsi/megaraid.c @@ -1938,7 +1938,7 @@ megaraid_abort(Scsi_Cmnd *cmd) static int -megaraid_reset(Scsi_Cmnd *cmd) +__megaraid_reset(Scsi_Cmnd *cmd) { adapter_t *adapter; megacmd_t mc; @@ -1972,6 +1972,18 @@ megaraid_reset(Scsi_Cmnd *cmd) return rval; } +static int +megaraid_reset(Scsi_Cmnd *cmd) +{ + adapter = (adapter_t *)cmd->device->host->hostdata; + int rc; + + spin_lock_irq(&adapter->lock); + rc = __megaraid_reset(cmd); + spin_unlock_irq(&adapter->lock); + + return rc; +} /** diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c index bec4406011aa..057ed45b54b2 100644 --- a/drivers/scsi/megaraid/megaraid_mbox.c +++ b/drivers/scsi/megaraid/megaraid_mbox.c @@ -2726,7 +2726,7 @@ megaraid_abort_handler(struct scsi_cmnd *scp) * host **/ static int -megaraid_reset_handler(struct scsi_cmnd *scp) +__megaraid_reset_handler(struct scsi_cmnd *scp) { adapter_t *adapter; scb_t *scb; @@ -2847,6 +2847,18 @@ megaraid_reset_handler(struct scsi_cmnd *scp) return rval; } +static int +megaraid_reset_handler(struct scsi_cmnd *cmd) +{ + int rc; + + spin_lock_irq(cmd->device->host->host_lock); + rc = __megaraid_reset_handler(cmd); + spin_unlock_irq(cmd->device->host->host_lock); + + return rc; +} + /* * START: internal commands library diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c index 638be81c4509..907a1e8cc880 100644 --- a/drivers/scsi/qla1280.c +++ b/drivers/scsi/qla1280.c @@ -1114,7 +1114,13 @@ qla1280_eh_abort(struct scsi_cmnd * cmd) static int qla1280_eh_device_reset(struct scsi_cmnd *cmd) { - return qla1280_error_action(cmd, DEVICE_RESET); + int rc; + + spin_lock_irq(cmd->device->host->host_lock); + rc = qla1280_error_action(cmd, DEVICE_RESET); + spin_unlock_irq(cmd->device->host->host_lock); + + return rc; } /************************************************************************** diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index 1693998aa727..360974eb2b26 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -613,12 +613,8 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd) qla_printk(KERN_INFO, ha, "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun); - spin_unlock_irq(ha->host->host_lock); - - if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) { - spin_lock_irq(ha->host->host_lock); + if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) goto eh_dev_reset_done; - } if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) { if (qla2x00_device_reset(ha, fcport) == 0) @@ -669,8 +665,6 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd) "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun); eh_dev_reset_done: - spin_lock_irq(ha->host->host_lock); - return ret; } diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 3877a78f5e50..87d925055b47 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -857,17 +857,14 @@ static int scsi_eh_abort_cmds(struct list_head *work_q, **/ static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd) { - unsigned long flags; - int rtn = FAILED; + int rtn; if (!scmd->device->host->hostt->eh_device_reset_handler) - return rtn; + return FAILED; scmd->owner = SCSI_OWNER_LOWLEVEL; - spin_lock_irqsave(scmd->device->host->host_lock, flags); rtn = scmd->device->host->hostt->eh_device_reset_handler(scmd); - spin_unlock_irqrestore(scmd->device->host->host_lock, flags); if (rtn == SUCCESS) { scmd->device->was_reset = 1; diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c index e2d055ed5b6f..5ea62552d47d 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -867,7 +867,13 @@ static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd) static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd) { - return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd); + int rc; + + spin_lock_irq(cmd->device->host->host_lock); + rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd); + spin_unlock_irq(cmd->device->host->host_lock); + + return rc; } static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd) diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 7dce9c01c357..739a9143477d 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -253,8 +253,6 @@ static int device_reset(struct scsi_cmnd *srb) US_DEBUGP("%s called\n", __FUNCTION__); - scsi_unlock(us_to_host(us)); - /* lock the device pointers and do the reset */ down(&(us->dev_semaphore)); if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { @@ -264,8 +262,6 @@ static int device_reset(struct scsi_cmnd *srb) result = us->transport_reset(us); up(&(us->dev_semaphore)); - /* lock the host for the return */ - scsi_lock(us_to_host(us)); return result; }