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authorBart Van Assche <bvanassche@acm.org>2011-01-13 22:02:25 +0300
committerRoland Dreier <rolandd@cisco.com>2011-01-14 01:00:43 +0300
commit695b83495e2fba9d3a883193cfc9d5eefa96a911 (patch)
tree23c03ec4fc840d6df5c038fe7eb49e224123f081 /drivers/infiniband/ulp
parent4162cf64973df51fc885825bc9ca4d055891c49f (diff)
downloadlinux-695b83495e2fba9d3a883193cfc9d5eefa96a911.tar.xz
IB/srp: Test only once whether iu allocation succeeded
Merge the two tests in srp_queuecommand() of whether information unit allocation succeeded into one. An intended side effect of this change is that we fix the warning: drivers/infiniband/ulp/srp/ib_srp.c: In function 'srp_queuecommand': drivers/infiniband/ulp/srp/ib_srp.c:1116: warning: 'req' may be used uninitialized in this function (seen with CONFIG_CC_OPTIMIZE_FOR_SIZE=y at least with gcc 4.4.4) Signed-off-by: Bart Van Assche <bvanassche@acm.org> Acked-by: David Dillow <dillowda@ornl.gov> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp')
-rw-r--r--drivers/infiniband/ulp/srp/ib_srp.c15
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 4b62105ed1e8..b28c2b9db26b 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1132,15 +1132,12 @@ static int srp_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scmnd)
spin_lock_irqsave(&target->lock, flags);
iu = __srp_get_tx_iu(target, SRP_IU_CMD);
- if (iu) {
- req = list_first_entry(&target->free_reqs, struct srp_request,
- list);
- list_del(&req->list);
- }
- spin_unlock_irqrestore(&target->lock, flags);
-
if (!iu)
- goto err;
+ goto err_unlock;
+
+ req = list_first_entry(&target->free_reqs, struct srp_request, list);
+ list_del(&req->list);
+ spin_unlock_irqrestore(&target->lock, flags);
dev = target->srp_host->srp_dev->dev;
ib_dma_sync_single_for_cpu(dev, iu->dma, srp_max_iu_len,
@@ -1185,6 +1182,8 @@ err_iu:
spin_lock_irqsave(&target->lock, flags);
list_add(&req->list, &target->free_reqs);
+
+err_unlock:
spin_unlock_irqrestore(&target->lock, flags);
err: