The fastboot tool for communicating with Android bootloaders does not work reliably with this device if USB 2 Link Power Management (LPM) is enabled.

Various fastboot commands are affected, including the following, which usually reproduces the problem within two tries:

fastboot getvar kernel getvar:kernel FAILED (remote: 'GetVar Variable Not found')

This issue was hidden on many systems up until commit 63a1f8454962 ("xhci: stored cached port capability values in one place") as the xhci driver failed to detect USB 2 LPM support if USB 3 ports were listed before USB 2 ports in the "supported protocol capabilities".

Adding the quirk resolves the issue. No drawbacks are expected since the device uses different USB product IDs outside of fastboot mode, and since fastboot commands worked before, until LPM was enabled on the tested system by the aforementioned commit.

Based on a patch from Forest forestix@nom.one from which most of the code and commit message is taken.

Cc: stable@vger.kernel.org Reported-by: Forest forestix@nom.one Closes: https://lore.kernel.org/hk8umj9lv4l4qguftdq1luqtdrpa1gks5l@sonic.net Tested-by: Forest forestix@nom.one Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com --- drivers/usb/core/quirks.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index 67732c791c93..59ed9768dae1 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -435,6 +435,9 @@ static const struct usb_device_id usb_quirk_list[] = { { USB_DEVICE(0x0c45, 0x7056), .driver_info = USB_QUIRK_IGNORE_REMOTE_WAKEUP },

+ /* Sony Xperia XZ1 Compact (lilac) smartphone in fastboot mode */ + { USB_DEVICE(0x0fce, 0x0dde), .driver_info = USB_QUIRK_NO_LPM }, + /* Action Semiconductor flash disk */ { USB_DEVICE(0x10d6, 0x2200), .driver_info = USB_QUIRK_STRING_FETCH_255 },