This is a note to let you know that I've just added the patch titled
USB: option: fix runtime PM handling
to the 3.15-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-option-fix-runtime-pm-handling.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From acf47d4f9c39b1cba467aa9442fc2efe0b1da741 Mon Sep 17 00:00:00 2001
From: Johan Hovold <jhovold@xxxxxxxxx>
Date: Mon, 26 May 2014 19:23:10 +0200
Subject: USB: option: fix runtime PM handling
From: Johan Hovold <jhovold@xxxxxxxxx>
commit acf47d4f9c39b1cba467aa9442fc2efe0b1da741 upstream.
Fix potential I/O while runtime suspended due to missing PM operations
in send_setup.
Fixes: 383cedc3bb43 ("USB: serial: full autosuspend support for the
option driver")
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/option.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1925,6 +1925,7 @@ static int option_send_setup(struct usb_
struct option_private *priv = intfdata->private;
struct usb_wwan_port_private *portdata;
int val = 0;
+ int res;
portdata = usb_get_serial_port_data(port);
@@ -1933,9 +1934,17 @@ static int option_send_setup(struct usb_
if (portdata->rts_state)
val |= 0x02;
- return usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ res = usb_autopm_get_interface(serial->interface);
+ if (res)
+ return res;
+
+ res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
0x22, 0x21, val, priv->bInterfaceNumber, NULL,
0, USB_CTRL_SET_TIMEOUT);
+
+ usb_autopm_put_interface(serial->interface);
+
+ return res;
}
MODULE_AUTHOR(DRIVER_AUTHOR);
Patches currently in stable-queue which might be from jhovold@xxxxxxxxx are
queue-3.15/usb-option-fix-runtime-pm-handling.patch
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