This is a note to let you know that I've just added the patch titled
USB-Serial: Fix error handling of usb_wwan
to the 3.10-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-serial-fix-error-handling-of-usb_wwan.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6c1ee66a0b2bdbd64c078fba684d640cf2fd38a9 Mon Sep 17 00:00:00 2001
From: Matt Burtch <matt@xxxxxxxxxxxx>
Date: Mon, 12 Aug 2013 10:11:39 -0700
Subject: USB-Serial: Fix error handling of usb_wwan
From: Matt Burtch <matt@xxxxxxxxxxxx>
commit 6c1ee66a0b2bdbd64c078fba684d640cf2fd38a9 upstream.
This fixes an issue where the bulk-in urb used for incoming data transfer
is not resubmitted if the packet recieved contains an error status. This
results in the driver locking until the port is closed and re-opened.
Tested on a custom board with a Cinterion GSM module.
Signed-off-by: Matt Burtch <matt@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/usb_wwan.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -291,18 +291,18 @@ static void usb_wwan_indat_callback(stru
tty_flip_buffer_push(&port->port);
} else
dev_dbg(dev, "%s: empty read urb received\n", __func__);
-
- /* Resubmit urb so we continue receiving */
- err = usb_submit_urb(urb, GFP_ATOMIC);
- if (err) {
- if (err != -EPERM) {
- dev_err(dev, "%s: resubmit read urb failed. (%d)\n", __func__, err);
- /* busy also in error unless we are killed */
- usb_mark_last_busy(port->serial->dev);
- }
- } else {
+ }
+ /* Resubmit urb so we continue receiving */
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err) {
+ if (err != -EPERM) {
+ dev_err(dev, "%s: resubmit read urb failed. (%d)\n",
+ __func__, err);
+ /* busy also in error unless we are killed */
usb_mark_last_busy(port->serial->dev);
}
+ } else {
+ usb_mark_last_busy(port->serial->dev);
}
}
Patches currently in stable-queue which might be from matt@xxxxxxxxxxxx are
queue-3.10/usb-serial-fix-error-handling-of-usb_wwan.patch
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