Need to check result of down_interruptible(). Return -EINTR if it fails.

diff --git a/comedi/drivers/quatech_daqp_cs.c b/comedi/drivers/quatech_daqp_cs.c
index e8308fe8eb205b42552ced9d5183929a25f9d15f..2eb1f976875942cdf25b055add9595d165943788 100644 (file)
--- a/comedi/drivers/quatech_daqp_cs.c
+++ b/comedi/drivers/quatech_daqp_cs.c
@@ -432,7 +432,8 @@ static int daqp_ai_insn_read(comedi_device * dev, comedi_subdevice * s,
 
                /* Wait for interrupt service routine to unblock semaphore */
                /* Maybe could use a timeout here, but it's interruptible */
-               down_interruptible(&local->eos);
+               if (down_interruptible(&local->eos))
+                       return -EINTR;
 
                data[i] = inb(dev->iobase + DAQP_FIFO);
                data[i] |= inb(dev->iobase + DAQP_FIFO) << 8;