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[SCSI] libsas: check for 'gone' expanders in smp_execute_task()

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No sense in issuing or retrying commands to an expander that has been
removed.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams 2011-12-21 15:19:56 -08:00 committed by James Bottomley
parent 0508c2f3b7
commit 3a9c5560f6
1 changed files with 5 additions and 0 deletions
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5
drivers/scsi/libsas/sas_expander.c
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@ -74,6 +74,11 @@ static int smp_execute_task(struct domain_device *dev, void *req, int req_size,
mutex_lock(&dev->ex_dev.cmd_mutex);
for (retry = 0; retry < 3; retry++) {
if (test_bit(SAS_DEV_GONE, &dev->state)) {
res = -ECOMM;
break;
}
task = sas_alloc_task(GFP_KERNEL);
if (!task) {
res = -ENOMEM;