From: Ian Abbott <abbotti@mev.co.uk>
Date: Tue, 15 Jul 2008 12:57:40 +0000 (+0000)
Subject: Need to check result of down_interruptible(). Return -EINTR if it fails.
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=712c50e7483278c8611ccf5a4e19185779342499;p=comedi.git

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 e8308fe8..2eb1f976 100644
--- 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;