[PATCH 3.18 49/85] usb: do not reset if a low-speed or full-speed device timed out

[Greg Kroah-Hartman]

3.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Maxim Moseychuk <franchesko.salias.hudro.pedros@xxxxxxxxx>

commit 6e01827ed93947895680fbdad68c072a0f4e2450 upstream.

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.

Fixes: 264904ccc33c ("usb: retry reset if a device times out")
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Maxim Moseychuk <franchesko.salias.hudro.pedros@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -4405,7 +4405,9 @@ hub_port_init (struct usb_hub *hub, stru
 				 * 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 =