This is a note to let you know that I've just added the patch titled
usb: musb: fix PM reference leak in musb_irq_work()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-musb-fix-pm-reference-leak-in-musb_irq_work.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9157c15ee6dd580c99d37d20d75e8924a6811668
Author: Bixuan Cui <cuibixuan@xxxxxxxxxx>
Date: Thu Apr 8 17:18:36 2021 +0800
usb: musb: fix PM reference leak in musb_irq_work()
[ Upstream commit 9535b99533904e9bc1607575aa8e9539a55435d7 ]
pm_runtime_get_sync will increment pm usage counter even it failed.
thus a pairing decrement is needed.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Bixuan Cui <cuibixuan@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210408091836.55227-1-cuibixuan@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 166f68f639c2..70ef603f7bb9 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1932,7 +1932,7 @@ static void musb_irq_work(struct work_struct *data)
struct musb *musb = container_of(data, struct musb, irq_work.work);
int error;
- error = pm_runtime_get_sync(musb->controller);
+ error = pm_runtime_resume_and_get(musb->controller);
if (error < 0) {
dev_err(musb->controller, "Could not enable: %i\n", error);
