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authorClemens Ladisch <clemens@ladisch.de>2011-01-22 17:05:03 +0300
committerStefan Richter <stefanr@s5r6.in-berlin.de>2011-01-23 14:31:01 +0300
commite71084af58cf15e6043338500eeaf6281d0a62af (patch)
treed757d4891a4f93f7a07c1f12448d3be3be748fa1 /drivers/firewire/core-device.c
parentdbc9880fa731fe2482a706bbabb4165269233063 (diff)
downloadlinux-e71084af58cf15e6043338500eeaf6281d0a62af.tar.xz
firewire: core: fix card->reset_jiffies overflow
On a 32-bit machine with, e.g., HZ=1000, jiffies will overflow after about 50 days, so if there are between 25 and 50 days between bus resets, the card->reset_jiffies comparisons can get wrong results. To fix this, ensure that this timestamp always uses 64 bits. Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: "Stefan Richter" <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/core-device.c')
-rw-r--r--drivers/firewire/core-device.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 6113b896e790..57461923bacf 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -747,7 +747,8 @@ static void fw_device_shutdown(struct work_struct *work)
container_of(work, struct fw_device, work.work);
int minor = MINOR(device->device.devt);
- if (time_is_after_jiffies(device->card->reset_jiffies + SHUTDOWN_DELAY)
+ if (time_before64(get_jiffies_64(),
+ device->card->reset_jiffies + SHUTDOWN_DELAY)
&& !list_empty(&device->card->link)) {
schedule_delayed_work(&device->work, SHUTDOWN_DELAY);
return;