This is a note to let you know that I've just added the patch titled
usb: udc: remove warning when queue disabled ep
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-udc-remove-warning-when-queue-disabled-ep.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 2a587a035214fa1b5ef598aea0b81848c5b72e5e Mon Sep 17 00:00:00 2001
From: yuan linyu <yuanlinyu@xxxxxxxxxxx>
Date: Fri, 15 Mar 2024 10:01:44 +0800
Subject: usb: udc: remove warning when queue disabled ep
From: yuan linyu <yuanlinyu@xxxxxxxxxxx>
commit 2a587a035214fa1b5ef598aea0b81848c5b72e5e upstream.
It is possible trigger below warning message from mass storage function,
WARNING: CPU: 6 PID: 3839 at drivers/usb/gadget/udc/core.c:294 usb_ep_queue+0x7c/0x104
pc : usb_ep_queue+0x7c/0x104
lr : fsg_main_thread+0x494/0x1b3c
Root cause is mass storage function try to queue request from main thread,
but other thread may already disable ep when function disable.
As there is no function failure in the driver, in order to avoid effort
to fix warning, change WARN_ON_ONCE() in usb_ep_queue() to pr_debug().
Suggested-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: yuan linyu <yuanlinyu@xxxxxxxxxxx>
Reviewed-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240315020144.2715575-1-yuanlinyu@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/gadget/udc/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -275,7 +275,9 @@ int usb_ep_queue(struct usb_ep *ep,
{
int ret = 0;
- if (WARN_ON_ONCE(!ep->enabled && ep->address)) {
+ if (!ep->enabled && ep->address) {
+ pr_debug("USB gadget: queue request to disabled ep 0x%x (%s)\n",
+ ep->address, ep->name);
ret = -ESHUTDOWN;
goto out;
}
Patches currently in stable-queue which might be from yuanlinyu@xxxxxxxxxxx are
queue-5.15/usb-udc-remove-warning-when-queue-disabled-ep.patch
