All accesses to @report_done are protected by qlock (or report-contexts).
No need to use an atomic.
While at it, invert the logic and call it "report_running". This is
similar to the uhid->running field and easier to read.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
---
drivers/hid/uhid.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index db4e119..2d2025a 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -47,7 +47,7 @@ struct uhid_device {
/* blocking GET_REPORT support; state changes protected by qlock */
struct mutex report_lock;
wait_queue_head_t report_wait;
- atomic_t report_done;
+ bool report_running;
u32 report_id;
struct uhid_event report_buf;
};
@@ -168,13 +168,13 @@ static int uhid_hid_get_raw(struct hid_device *hid, unsigned char rnum,
ev->u.feature.rnum = rnum;
ev->u.feature.rtype = report_type;
- atomic_set(&uhid->report_done, 0);
+ uhid->report_running = true;
uhid_queue(uhid, ev);
spin_unlock_irqrestore(&uhid->qlock, flags);
ret = wait_event_interruptible_timeout(uhid->report_wait,
- atomic_read(&uhid->report_done) || !uhid->running,
- 5 * HZ);
+ !uhid->report_running || !uhid->running,
+ 5 * HZ);
if (!ret || !uhid->running) {
ret = -EIO;
@@ -196,7 +196,7 @@ static int uhid_hid_get_raw(struct hid_device *hid, unsigned char rnum,
spin_unlock_irqrestore(&uhid->qlock, flags);
}
- atomic_set(&uhid->report_done, 1);
+ uhid->report_running = false;
unlock:
mutex_unlock(&uhid->report_lock);
@@ -500,11 +500,11 @@ static int uhid_dev_feature_answer(struct uhid_device *uhid,
/* id for old report; drop it silently */
if (uhid->report_id != ev->u.feature_answer.id)
goto unlock;
- if (atomic_read(&uhid->report_done))
+ if (!uhid->report_running)
goto unlock;
memcpy(&uhid->report_buf, ev, sizeof(*ev));
- atomic_set(&uhid->report_done, 1);
+ uhid->report_running = false;
wake_up_interruptible(&uhid->report_wait);
unlock:
@@ -526,7 +526,6 @@ static int uhid_char_open(struct inode *inode, struct file *file)
init_waitqueue_head(&uhid->waitq);
init_waitqueue_head(&uhid->report_wait);
uhid->running = false;
- atomic_set(&uhid->report_done, 1);
file->private_data = uhid;
nonseekable_open(inode, file);
--
2.0.3
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