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USB: serial: mos7840: fix error code in mos7840_write() 

This should return -ENOMEM instead of 0 if the kmalloc() fails.

Fixes: 3f5429746d ("USB: Moschip 7840 USB-Serial Driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Dan Carpenter 2021-01-26 13:26:54 +03:00 committed by Johan Hovold
parent 5f6225a7fb
commit a70aa7dc60
1 changed files with 3 additions and 1 deletions
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4
drivers/usb/serial/mos7840.c
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@ -883,8 +883,10 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
if (urb->transfer_buffer == NULL) { if (urb->transfer_buffer == NULL) {
urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
GFP_ATOMIC); GFP_ATOMIC);
if (!urb->transfer_buffer) if (!urb->transfer_buffer) {
bytes_sent = -ENOMEM;
goto exit; goto exit;
}
} }
transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);