Commit 6e01827e authored Jan 04, 2018 by Maxim Moseychuk Committed by Greg Kroah-Hartman Apr 25, 2018

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.

Fixes: 264904cc ("usb: retry reset if a device times out")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Maxim Moseychuk <franchesko.salias.hudro.pedros@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 3f0989e4

drivers/usb/core/hub.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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 =

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