* [PATCH] dmaengine: idxd: add missing percpu ref put on failure
@ 2021-06-24 19:08 Dave Jiang
2021-07-14 6:58 ` Vinod Koul
0 siblings, 1 reply; 2+ messages in thread
From: Dave Jiang @ 2021-06-24 19:08 UTC (permalink / raw)
To: vkoul; +Cc: dmaengine
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: 93a40a6d7428 ("dmaengine: idxd: add percpu_ref to descriptor submission path")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/dma/idxd/submit.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/idxd/submit.c b/drivers/dma/idxd/submit.c
index 19afb62abaff..b0f1ddf75d31 100644
--- a/drivers/dma/idxd/submit.c
+++ b/drivers/dma/idxd/submit.c
@@ -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);
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] dmaengine: idxd: add missing percpu ref put on failure
2021-06-24 19:08 [PATCH] dmaengine: idxd: add missing percpu ref put on failure Dave Jiang
@ 2021-07-14 6:58 ` Vinod Koul
0 siblings, 0 replies; 2+ messages in thread
From: Vinod Koul @ 2021-07-14 6:58 UTC (permalink / raw)
To: Dave Jiang; +Cc: dmaengine
On 24-06-21, 12:08, Dave Jiang wrote:
> 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.
Applied, thanks
--
~Vinod
^ permalink raw reply [flat|nested] 2+ messages in thread
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