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| author | Mike Christie <michaelc@cs.wisc.edu> | 2010-10-06 22:51:17 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-10-25 14:55:57 -0500 |
| commit | 92b3e5bbbebe86dd0071ccf23c1b21031f74bf56 (patch) | |
| tree | 0d093ba4395b1cff4aa6f75c6b90c295d616a06c | |
| parent | d64eab764aaf1455d4cd790e3651a2d65b69e661 (diff) | |
| download | op-kernel-dev-92b3e5bbbebe86dd0071ccf23c1b21031f74bf56.zip op-kernel-dev-92b3e5bbbebe86dd0071ccf23c1b21031f74bf56.tar.gz | |
[SCSI] qla4xxx: grab hardware_lock in eh_abort before accessing srb
grab hardware_lock in eh_abort before accessing srb to avoid
race between command completion and get refcount on srb.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
| -rw-r--r-- | drivers/scsi/qla4xxx/ql4_os.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 4b6cdb6..f1c58eb 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -2006,6 +2006,7 @@ static int qla4xxx_eh_abort(struct scsi_cmnd *cmd) unsigned int id = cmd->device->id; unsigned int lun = cmd->device->lun; unsigned long serial = cmd->serial_number; + unsigned long flags; struct srb *srb = NULL; int ret = SUCCESS; int wait = 0; @@ -2014,12 +2015,14 @@ static int qla4xxx_eh_abort(struct scsi_cmnd *cmd) "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n", ha->host_no, id, lun, cmd, serial); + spin_lock_irqsave(&ha->hardware_lock, flags); srb = (struct srb *) CMD_SP(cmd); - - if (!srb) + if (!srb) { + spin_unlock_irqrestore(&ha->hardware_lock, flags); return SUCCESS; - + } kref_get(&srb->srb_ref); + spin_unlock_irqrestore(&ha->hardware_lock, flags); if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) { DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n", |
