patch "usb: do not reset if a low-speed or full-speed device timed out" added to usb-next

This is a note to let you know that I've just added the patch titled

usb: do not reset if a low-speed or full-speed device timed out

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will also be merged in the next major kernel release during the merge window.

If you have any questions about this process, please let me know.

From: Maxim Moseychuk <[email protected]>
Date: Thu, 4 Jan 2018 21:43:03 +0300
Subject: usb: do not reset if a low-speed or full-speed device timed out

Some low-speed and full-speed devices (for example, bluetooth) do not have time to initialize. For them, ETIMEDOUT is a valid error. We need to give them another try. Otherwise, they will never be initialized correctly and in dmesg will be messages "Bluetooth: hci0 command 0x1002 tx timeout" or similars.

---
 drivers/usb/core/hub.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index 92378594a86e..a86591772352 100644
@@ -4555,7 +4555,9 @@ hub_port_init(struct usb_hub *hub, struct usb_device *udev, int port1,
 				 * reset. But only on the first attempt,
 				 * lest we get into a time out/reset loop
 				 */
-				if (r == 0  || (r == -ETIMEDOUT && retries == 0))
+				if (r == 0 || (r == -ETIMEDOUT &&
+						retries == 0 &&
+						udev->speed > USB_SPEED_FULL))
 					break;
 			}
 			udev->descriptor.bMaxPacketSize0 =

2.17.0