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

commit 6e01827ed9 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: 264904ccc3 ("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>
pull/10/head
Maxim Moseychuk 2018-01-04 21:43:03 +03:00 committed by Greg Kroah-Hartman
parent 8b03376580
commit 3c22218ed8
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/core/hub.c
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@ -4519,7 +4519,9 @@ 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 =