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| author | yuan linyu <yuanlinyu@hihonor.com> | 2024-03-15 05:01:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-03 16:19:52 +0300 |
| commit | f74c5e0b54b02706d9a862ac6cddade30ac86bcf (patch) | |
| tree | 258c57476a6a881f84bcd3824ba15abcb3a493f3 /drivers/usb | |
| parent | 19ca7ef7d83974574b0edc8894607d1544f157d6 (diff) | |
| download | linux-f74c5e0b54b02706d9a862ac6cddade30ac86bcf.tar.xz | |
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/udc/core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c index 0edd9e53fc5a..82a10774a7eb 100644 --- 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; } |