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authorJohan Hovold <johan@kernel.org>2017-01-06 21:15:14 +0300
committerJohan Hovold <johan@kernel.org>2017-01-09 16:55:38 +0300
commitce5e292828117d1b71cbd3edf9e9137cf31acd30 (patch)
tree166a5fabbc2bbd48906e274cadcc31e6bd1fc271 /drivers/usb
parentf2950b78547ffb8475297ada6b92bc2d774d5461 (diff)
downloadlinux-ce5e292828117d1b71cbd3edf9e9137cf31acd30.tar.xz
USB: serial: ch341: fix resume after reset
Fix reset-resume handling which failed to resubmit the read and interrupt URBs, thereby leaving a port that was open before suspend in a broken state until closed and reopened. Fixes: 1ded7ea47b88 ("USB: ch341 serial: fix port number changed after resume") Fixes: 2bfd1c96a9fb ("USB: serial: ch341: remove reset_resume callback") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/serial/ch341.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 8f41d4385f1c..5343d65f3b52 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -582,14 +582,23 @@ static int ch341_tiocmget(struct tty_struct *tty)
static int ch341_reset_resume(struct usb_serial *serial)
{
- struct ch341_private *priv;
-
- priv = usb_get_serial_port_data(serial->port[0]);
+ struct usb_serial_port *port = serial->port[0];
+ struct ch341_private *priv = usb_get_serial_port_data(port);
+ int ret;
/* reconfigure ch341 serial port after bus-reset */
ch341_configure(serial->dev, priv);
- return 0;
+ if (tty_port_initialized(&port->port)) {
+ ret = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
+ if (ret) {
+ dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ return usb_serial_generic_resume(serial);
}
static struct usb_serial_driver ch341_device = {