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| author | Johan Hovold <johan@kernel.org> | 2017-10-12 10:54:21 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-21 09:49:22 +0100 |
| commit | b55d4612484e516ce2e9804db619f7aa66ecb5e7 (patch) | |
| tree | 99e0cece0427606ef332f075ffdd7d3760dfd946 | |
| parent | d74d586746ccf743df309ed2c9a4232e858dbd68 (diff) | |
| download | linux-stable-b55d4612484e516ce2e9804db619f7aa66ecb5e7.tar.gz linux-stable-b55d4612484e516ce2e9804db619f7aa66ecb5e7.tar.bz2 linux-stable-b55d4612484e516ce2e9804db619f7aa66ecb5e7.zip | |
USB: serial: metro-usb: stop I/O after failed open
commit 2339536d229df25c71c0900fc619289229bfecf6 upstream.
Make sure to kill the interrupt-in URB after a failed open request.
Apart from saving power (and avoiding stale input after a later
successful open), this also prevents a NULL-deref in the completion
handler if the port is manually unbound.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes: 704577861d5e ("USB: serial: metro-usb: get data from device in Uni-Directional mode.")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/serial/metro-usb.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index 14511d6a7d44..3950d44b80f1 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -189,7 +189,7 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port) dev_err(&port->dev, "%s - failed submitting interrupt in urb, error code=%d\n", __func__, result); - goto exit; + return result; } /* Send activate cmd to device */ @@ -198,9 +198,14 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port) dev_err(&port->dev, "%s - failed to configure device, error code=%d\n", __func__, result); - goto exit; + goto err_kill_urb; } -exit: + + return 0; + +err_kill_urb: + usb_kill_urb(port->interrupt_in_urb); + return result; } |