This is a note to let you know that I've just added the patch titled
USB: cdc-acm: Do not log urb submission errors on disconnect
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-cdc-acm-do-not-log-urb-submission-errors-on-disconnect.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f0386c083c2ce85284dc0b419d7b89c8e567c09f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Sun, 14 Jan 2018 16:09:00 +0100
Subject: USB: cdc-acm: Do not log urb submission errors on disconnect
From: Hans de Goede <hdegoede@xxxxxxxxxx>
commit f0386c083c2ce85284dc0b419d7b89c8e567c09f upstream.
When disconnected sometimes the cdc-acm driver logs errors like these:
[20278.039417] cdc_acm 2-2:2.1: urb 9 failed submission with -19
[20278.042924] cdc_acm 2-2:2.1: urb 10 failed submission with -19
[20278.046449] cdc_acm 2-2:2.1: urb 11 failed submission with -19
[20278.049920] cdc_acm 2-2:2.1: urb 12 failed submission with -19
[20278.053442] cdc_acm 2-2:2.1: urb 13 failed submission with -19
[20278.056915] cdc_acm 2-2:2.1: urb 14 failed submission with -19
[20278.060418] cdc_acm 2-2:2.1: urb 15 failed submission with -19
Silence these by not logging errors when the result is -ENODEV.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Acked-by: Oliver Neukum <oneukum@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/class/cdc-acm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -425,7 +425,7 @@ static int acm_submit_read_urb(struct ac
res = usb_submit_urb(acm->read_urbs[index], mem_flags);
if (res) {
- if (res != -EPERM) {
+ if (res != -EPERM && res != -ENODEV) {
dev_err(&acm->data->dev,
"urb %d failed submission with %d\n",
index, res);
Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are
queue-4.15/usb-uas-unconditionally-bring-back-host-after-reset.patch
queue-4.15/usb-cdc-acm-do-not-log-urb-submission-errors-on-disconnect.patch