patch "staging: comedi: jr3_pci: cope with jiffies wraparound" added to staging-testing

This is a note to let you know that I've just added the patch titled

staging: comedi: jr3_pci: cope with jiffies wraparound

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the staging-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From: Ian Abbott <[email protected]>
Date: Fri, 17 Feb 2017 11:09:09 +0000
Subject: staging: comedi: jr3_pci: cope with jiffies wraparound

The timer expiry routine jr3_pci_poll_dev() checks for expiry by checking whether the absolute value of jiffies (stored in local variable now) is greater than the expected expiry time in jiffy units. This will fail when jiffies wraps around. Also, it seems to make sense to handle the expiry one jiffy earlier than the current test. Use time_after_eq() to check for expiry.

---
 drivers/staging/comedi/drivers/jr3_pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 25909a936e7c..eb0a095efe9c 100644
@@ -611,7 +611,7 @@ static void jr3_pci_poll_dev(unsigned long data)
 		s = &dev->subdevices[i];
 		spriv = s->private;
 
-		if (now > spriv->next_time_min) {
+		if (time_after_eq(now, spriv->next_time_min)) {
 			struct jr3_pci_poll_delay sub_delay;
 
 			sub_delay = jr3_pci_poll_subdevice(s);

2.11.1