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dmaengine: idxd: add missing percpu ref put on failure

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When enqcmds() fails, exit path is missing a percpu_ref_put(). This can
cause failure on shutdown path when the driver is attempting to quiesce the
wq. Add missing percpu_ref_put() call on the error exit path.

Fixes: 93a40a6d74 ("dmaengine: idxd: add percpu_ref to descriptor submission path")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162456170168.1121236.7240941044089212312.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang 2021-06-24 12:08:21 -07:00 committed by Vinod Koul
parent 53499d1fc1
commit ac24a2dc06
1 changed files with 3 additions and 1 deletions
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4
drivers/dma/idxd/submit.c
View file

@ -118,8 +118,10 @@ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc)
* device is not accepting descriptor at all.
*/
rc = enqcmds(portal, desc->hw);
if (rc < 0)
if (rc < 0) {
percpu_ref_put(&wq->wq_active);
return rc;
}
}
percpu_ref_put(&wq->wq_active);