USB: kobil_sct: 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: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index 3d2bd65df0fc71e05ca330a136b8c51280f9ab3d..02c420af251e27bb2cb3c4475343b8a869ae1ef5 100644 (file)
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -335,7 +335,8 @@ static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
                        port->interrupt_out_urb->transfer_buffer_length = length;
 
                        priv->cur_pos = priv->cur_pos + length;
-                       result = usb_submit_urb(port->interrupt_out_urb, GFP_NOIO);
+                       result = usb_submit_urb(port->interrupt_out_urb,
+                                       GFP_ATOMIC);
                        dev_dbg(&port->dev, "%s - Send write URB returns: %i\n", __func__, result);
                        todo = priv->filled - priv->cur_pos;
 
@@ -350,7 +351,7 @@ static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
                if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
                        priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
                        result = usb_submit_urb(port->interrupt_in_urb,
-                                                               GFP_NOIO);
+                                       GFP_ATOMIC);
                        dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result);
                }
        }