[PATCH 5.11 591/775] USB: serial: mos7720: fix error code in mos7720_write()

[Greg Kroah-Hartman]

From: Dan Carpenter <dan.carpen...@oracle.com>

commit fea7372cbc40869876df0f045e367f6f97a1666c upstream.

This code should return -ENOMEM if the kmalloc() fails but instead
it returns success.

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Fixes: 0f64478cbc7a ("USB: add USB serial mos7720 driver")
Cc: sta...@vger.kernel.org
Signed-off-by: Johan Hovold <jo...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/usb/serial/mos7720.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -1092,8 +1092,10 @@ static int mos7720_write(struct tty_stru
        if (urb->transfer_buffer == NULL) {
                urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
                                               GFP_ATOMIC);
-               if (!urb->transfer_buffer)
+               if (!urb->transfer_buffer) {
+                       bytes_sent = -ENOMEM;
                        goto exit;
+               }
        }
        transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);