usb: udc: remove warning when queue disabled ep

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@rowland.harvard.edu>
Cc: stable@vger.kernel.org
Signed-off-by: yuan linyu <yuanlinyu@hihonor.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20240315020144.2715575-1-yuanlinyu@hihonor.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index d59f94464b870b76c21a5b0380460479fdd1e8ed..8ac29f7230fcdd1f59f6bd4562ef54c46990869e 100644 (file)
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -292,7 +292,9 @@ 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;
        }