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>
diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 4b62105..b28c2b9 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1132,15 +1132,12 @@
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 @@
spin_lock_irqsave(&target->lock, flags);
list_add(&req->list, &target->free_reqs);
+
+err_unlock:
spin_unlock_irqrestore(&target->lock, flags);
err: