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ixgbe: Update ptp_overflow check comment and jiffies

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This patch fixes the comment on ptp_overflow_check to match up with what is
currently used as the parameters. Also change the jiffies check to use
time_is_after_jiffies macro.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller 2012-12-05 07:24:35 +00:00 committed by Jeff Kirsher
parent aeb8264847
commit f2f33387f9
1 changed files with 7 additions and 7 deletions
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14
drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c
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@ -407,21 +407,21 @@ void ixgbe_ptp_check_pps_event(struct ixgbe_adapter *adapter, u32 eicr)
/**
* ixgbe_ptp_overflow_check - delayed work to detect SYSTIME overflow
* @work: structure containing information about this work task
* ixgbe_ptp_overflow_check - watchdog task to detect SYSTIME overflow
* @adapter: private adapter struct
*
* this work function is scheduled to continue reading the timecounter
* this watchdog task periodically reads the timecounter
* in order to prevent missing when the system time registers wrap
* around. This needs to be run approximately twice a minute when no
* PTP activity is occurring.
* around. This needs to be run approximately twice a minute.
*/
void ixgbe_ptp_overflow_check(struct ixgbe_adapter *adapter)
{
unsigned long elapsed_jiffies = adapter->last_overflow_check - jiffies;
bool timeout = time_is_before_jiffies(adapter->last_overflow_check +
IXGBE_OVERFLOW_PERIOD);
struct timespec ts;
if ((adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED) &&
(elapsed_jiffies >= IXGBE_OVERFLOW_PERIOD)) {
(timeout)) {
ixgbe_ptp_gettime(&adapter->ptp_caps, &ts);
adapter->last_overflow_check = jiffies;
}