USB: opticon: fix non-atomic allocation in write path

Write may be called from interrupt context so make sure to use
GFP_ATOMIC for all allocations in write.

Fixes: 0d930e51cfe6 ("USB: opticon: Add Opticon OPN2001 write support")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 4856fb7..4b7bfb3 100644 (file)
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -215,7 +215,7 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
 
        /* The connected devices do not have a bulk write endpoint,
         * to transmit data to de barcode device the control endpoint is used */
-       dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO);
+       dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
        if (!dr) {
                count = -ENOMEM;
                goto error_no_dr;