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-testing 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 be merged to the usb-next branch sometime soon,
after it passes testing, and the merge window is open.
If you have any questions about this process, please let me know.
>From 6e01827ed93947895680fbdad68c072a0f4e2450 Mon Sep 17 00:00:00 2001
From: Maxim Moseychuk <franchesko.salias.hudro.pedros@xxxxxxxxx>
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.
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(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 92378594a86e..a86591772352 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -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
