diff options
| author | Jie Deng <dengjie03@kylinos.cn> | 2026-02-27 11:49:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-02 14:07:16 +0300 |
| commit | 56bc8de780720d033ee68e88dff3050308dcdd27 (patch) | |
| tree | 39f389857a974ef9f5c60ddee0b79475d592697a /Documentation | |
| parent | 1eed0199dbf41d6ac87243b38ebffbedc8454354 (diff) | |
| download | linux-56bc8de780720d033ee68e88dff3050308dcdd27.tar.xz | |
usb: core: new quirk to handle devices with zero configurations
[ Upstream commit 9f6a983cfa22ac662c86e60816d3a357d4b551e9 ]
Some USB devices incorrectly report bNumConfigurations as 0 in their
device descriptor, which causes the USB core to reject them during
enumeration.
logs:
usb 1-2: device descriptor read/64, error -71
usb 1-2: no configurations
usb 1-2: can't read configurations, error -22
However, these devices actually work correctly when
treated as having a single configuration.
Add a new quirk USB_QUIRK_FORCE_ONE_CONFIG to handle such devices.
When this quirk is set, assume the device has 1 configuration instead
of failing with -EINVAL.
This quirk is applied to the device with VID:PID 5131:2007 which
exhibits this behavior.
Signed-off-by: Jie Deng <dengjie03@kylinos.cn>
Link: https://patch.msgid.link/20260227084931.1527461-1-dengjie03@kylinos.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index fff3ca50c6c2..fdbc2749fbb3 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6901,6 +6901,9 @@ p = USB_QUIRK_SHORT_SET_ADDRESS_REQ_TIMEOUT (Reduce timeout of the SET_ADDRESS request from 5000 ms to 500 ms); + q = USB_QUIRK_FORCE_ONE_CONFIG (Device + claims zero configurations, + forcing to 1); Example: quirks=0781:5580:bk,0a5c:5834:gij usbhid.mousepoll= |