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.
Cc: <stable@xxxxxxxxxxxxxxx> # 3.15+
Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
---
drivers/staging/comedi/drivers/jr3_pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/jr3_pci.c b/drivers/staging/comedi/drivers/jr3_pci.c
index 25909a936e7c..eb0a095efe9c 100644
--- a/drivers/staging/comedi/drivers/jr3_pci.c
+++ b/drivers/staging/comedi/drivers/jr3_pci.c
@@ -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);
--
2.11.0
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