Added missing spinlock around usage of devpriv->ai_mite_chan

diff --git a/comedi/drivers/ni_mio_common.c b/comedi/drivers/ni_mio_common.c
index 3cd24abdeaa0b97b92c59659a4661fa47af1ea86..bd69df4768510e57180906f4b6eac2d88a4acf8f 100644 (file)
--- a/comedi/drivers/ni_mio_common.c
+++ b/comedi/drivers/ni_mio_common.c
@@ -1542,6 +1542,7 @@ static int ni_ai_setup_MITE_dma(comedi_device * dev)
 {
        comedi_subdevice *s = dev->subdevices + NI_AI_SUBDEV;
        int retval;
+       unsigned long flags;
 
        retval = ni_request_ai_mite_channel(dev);
        if (retval)
@@ -1551,6 +1552,8 @@ static int ni_ai_setup_MITE_dma(comedi_device * dev)
        /* write alloc the entire buffer */
        comedi_buf_write_alloc(s->async, s->async->prealloc_bufsz);
 
+
+       comedi_spin_lock_irqsave(&devpriv->mite_channel_lock, flags);
        switch (boardtype.reg_type) {
        case ni_reg_611x:
        case ni_reg_6143:
@@ -1565,6 +1568,8 @@ static int ni_ai_setup_MITE_dma(comedi_device * dev)
        };
        /*start the MITE */
        mite_dma_arm(devpriv->ai_mite_chan);
+       comedi_spin_unlock_irqrestore(&devpriv->mite_channel_lock, flags);
+
        return 0;
 }