diff options
Diffstat (limited to 'drivers/usb/serial/mos7840.c')
| -rw-r--r-- | drivers/usb/serial/mos7840.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c index fdceb46d9fc6..b42bad85097a 100644 --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -468,6 +468,9 @@ static void mos7840_control_callback(struct urb *urb) } dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length); + if (urb->actual_length < 1) + goto out; + dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__, mos7840_port->MsrLsr, mos7840_port->port_num); data = urb->transfer_buffer; @@ -802,18 +805,19 @@ static void mos7840_bulk_out_data_callback(struct urb *urb) struct moschip_port *mos7840_port; struct usb_serial_port *port; int status = urb->status; + unsigned long flags; int i; mos7840_port = urb->context; port = mos7840_port->port; - spin_lock(&mos7840_port->pool_lock); + spin_lock_irqsave(&mos7840_port->pool_lock, flags); for (i = 0; i < NUM_URBS; i++) { if (urb == mos7840_port->write_urb_pool[i]) { mos7840_port->busy[i] = 0; break; } } - spin_unlock(&mos7840_port->pool_lock); + spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); if (status) { dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); |