summaryrefslogtreecommitdiffstats
path: root/drivers/ptp/ptp_sysfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ptp/ptp_sysfs.c')
-rw-r--r--drivers/ptp/ptp_sysfs.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/ptp/ptp_sysfs.c b/drivers/ptp/ptp_sysfs.c
index 34ea5c1612..f7a499a1bd 100644
--- a/drivers/ptp/ptp_sysfs.c
+++ b/drivers/ptp/ptp_sysfs.c
@@ -75,17 +75,21 @@ static ssize_t extts_fifo_show(struct device *dev,
struct device_attribute *attr, char *page)
{
struct ptp_clock *ptp = dev_get_drvdata(dev);
- struct timestamp_event_queue *queue = &ptp->tsevq;
+ struct timestamp_event_queue *queue;
struct ptp_extts_event event;
unsigned long flags;
size_t qcnt;
int cnt = 0;
- memset(&event, 0, sizeof(event));
+ cnt = list_count_nodes(&ptp->tsevqs);
+ if (cnt <= 0)
+ goto out;
- if (mutex_lock_interruptible(&ptp->tsevq_mux))
- return -ERESTARTSYS;
+ /* The sysfs fifo will always draw from the fist queue */
+ queue = list_first_entry(&ptp->tsevqs, struct timestamp_event_queue,
+ qlist);
+ memset(&event, 0, sizeof(event));
spin_lock_irqsave(&queue->lock, flags);
qcnt = queue_cnt(queue);
if (qcnt) {
@@ -101,7 +105,6 @@ static ssize_t extts_fifo_show(struct device *dev,
cnt = snprintf(page, PAGE_SIZE, "%u %lld %u\n",
event.index, event.t.sec, event.t.nsec);
out:
- mutex_unlock(&ptp->tsevq_mux);
return cnt;
}
static DEVICE_ATTR(fifo, 0444, extts_fifo_show, NULL);