From 3e796a0c57654daa7b55a1e2f646f314d862d94d Mon Sep 17 00:00:00 2001 From: Julius Werner Date: Tue, 4 Mar 2014 10:52:39 -0800 Subject: [PATCH] usb: Add device quirk for Logitech HD Pro Webcams C920 and C930e We've encountered a rare issue when enumerating two Logitech webcams after a reboot that doesn't power cycle the USB ports. They are spewing random data (possibly some leftover UVC buffers) on the second (full-sized) Get Configuration request of the enumeration phase. Since the data is random this can potentially cause all kinds of odd behavior, and since it occasionally happens multiple times (after the kernel issues another reset due to the garbled configuration descriptor), it is not always recoverable. Set the USB_DELAY_INIT quirk that seems to work around the issue. Signed-off-by: Julius Werner Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/quirks.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index 8f37063c0a49e..739ee8e8bdfda 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -47,6 +47,10 @@ static const struct usb_device_id usb_quirk_list[] = { /* Microsoft LifeCam-VX700 v2.0 */ { USB_DEVICE(0x045e, 0x0770), .driver_info = USB_QUIRK_RESET_RESUME }, + /* Logitech HD Pro Webcams C920 and C930e */ + { USB_DEVICE(0x046d, 0x082d), .driver_info = USB_QUIRK_DELAY_INIT }, + { USB_DEVICE(0x046d, 0x0843), .driver_info = USB_QUIRK_DELAY_INIT }, + /* Logitech Quickcam Fusion */ { USB_DEVICE(0x046d, 0x08c1), .driver_info = USB_QUIRK_RESET_RESUME }, -- 2.39.5