This is a note to let you know that I've just added the patch titled
usb: musb: Balance list entry in musb_gadget_queue
to the 5.15-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-balance-list-entry-in-musb_gadget_queue.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 21b5fcdccb32ff09b6b63d4a83c037150665a83f Mon Sep 17 00:00:00 2001
From: Viraj Shah <viraj.shah@xxxxxxxxxxxxx>
Date: Thu, 21 Oct 2021 11:36:44 +0200
Subject: usb: musb: Balance list entry in musb_gadget_queue
From: Viraj Shah <viraj.shah@xxxxxxxxxxxxx>
commit 21b5fcdccb32ff09b6b63d4a83c037150665a83f upstream.
musb_gadget_queue() adds the passed request to musb_ep::req_list. If the
endpoint is idle and it is the first request then it invokes
musb_queue_resume_work(). If the function returns an error then the
error is passed to the caller without any clean-up and the request
remains enqueued on the list. If the caller enqueues the request again
then the list corrupts.
Remove the request from the list on error.
Fixes: ea2f35c01d5ea ("usb: musb: Fix sleeping function called from invalid context for hdrc glue")
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Viraj Shah <viraj.shah@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211021093644.4734-1-viraj.shah@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/musb/musb_gadget.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1247,9 +1247,11 @@ static int musb_gadget_queue(struct usb_
status = musb_queue_resume_work(musb,
musb_ep_restart_resume_work,
request);
- if (status < 0)
+ if (status < 0) {
dev_err(musb->controller, "%s resume work: %i\n",
__func__, status);
+ list_del(&request->list);
+ }
}
unlock:
Patches currently in stable-queue which might be from viraj.shah@xxxxxxxxxxxxx are
queue-5.15/usb-musb-balance-list-entry-in-musb_gadget_queue.patch
