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usb: core: add USB_QUIRK_NO_BOS for devices that hang on BOS descriptor

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Add USB_QUIRK_NO_BOS quirk flag to skip requesting the BOS descriptor
for devices that cannot handle it.

Add Elgato 4K X (0fd9:009b) to the quirk table. This device hangs when
the BOS descriptor is requested at SuperSpeed Plus (10Gbps).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=220027
Cc: stable <stable@kernel.org>
Signed-off-by: Johannes Brüderl <johannes.bruederl@gmail.com>
Link: https://patch.msgid.link/20251207090220.14807-1-johannes.bruederl@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Brüderl
2025-12-07 10:02:20 +01:00
committed by Greg Kroah-Hartman
parent 1d32389dc5
commit 2740ac33c8
3 changed files with 11 additions and 0 deletions
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5
drivers/usb/core/config.c
View File

@@ -1040,6 +1040,11 @@ int usb_get_bos_descriptor(struct usb_device *dev)
__u8 cap_type;
int ret;
if (dev->quirks & USB_QUIRK_NO_BOS) {
dev_dbg(ddev, "skipping BOS descriptor\n");
return -ENOMSG;
}
bos = kzalloc(sizeof(*bos), GFP_KERNEL);
if (!bos)
return -ENOMEM;

3
drivers/usb/core/quirks.c
View File

@@ -450,6 +450,9 @@ static const struct usb_device_id usb_quirk_list[] = {
{ USB_DEVICE(0x0c45, 0x7056), .driver_info =
USB_QUIRK_IGNORE_REMOTE_WAKEUP },
/* Elgato 4K X - BOS descriptor fetch hangs at SuperSpeed Plus */
{ USB_DEVICE(0x0fd9, 0x009b), .driver_info = USB_QUIRK_NO_BOS },
/* Sony Xperia XZ1 Compact (lilac) smartphone in fastboot mode */
{ USB_DEVICE(0x0fce, 0x0dde), .driver_info = USB_QUIRK_NO_LPM },

3
include/linux/usb/quirks.h
View File

@@ -75,4 +75,7 @@
/* short SET_ADDRESS request timeout */
#define USB_QUIRK_SHORT_SET_ADDRESS_REQ_TIMEOUT BIT(16)
/* skip BOS descriptor request */
#define USB_QUIRK_NO_BOS BIT(17)
#endif /* __LINUX_USB_QUIRKS_H */