diff options
| author | David Herrmann <dh.herrmann@gmail.com> | 2014-07-29 19:14:19 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2014-08-25 12:28:06 +0400 |
| commit | 8cad5b017178bd7fa56d5039478d46964bcd94f7 (patch) | |
| tree | b032db8dbcabe50cc61d23f36f3bdb80c7959678 /drivers/hid/uhid.c | |
| parent | 25be7fe2be879a96920cc74809e1bff1b0ae0bac (diff) | |
| download | linux-8cad5b017178bd7fa56d5039478d46964bcd94f7.tar.xz | |
HID: uhid: turn report_id into u32
All accesses to @report_id are protected by @qlock. No need to use an
atomic.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/uhid.c')
| -rw-r--r-- | drivers/hid/uhid.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c index 5dee8bd60745..db4e119cb088 100644 --- a/drivers/hid/uhid.c +++ b/drivers/hid/uhid.c @@ -44,10 +44,11 @@ struct uhid_device { __u8 tail; struct uhid_event *outq[UHID_BUFSIZE]; + /* blocking GET_REPORT support; state changes protected by qlock */ struct mutex report_lock; wait_queue_head_t report_wait; atomic_t report_done; - atomic_t report_id; + u32 report_id; struct uhid_event report_buf; }; @@ -163,7 +164,7 @@ static int uhid_hid_get_raw(struct hid_device *hid, unsigned char rnum, spin_lock_irqsave(&uhid->qlock, flags); ev->type = UHID_FEATURE; - ev->u.feature.id = atomic_inc_return(&uhid->report_id); + ev->u.feature.id = ++uhid->report_id; ev->u.feature.rnum = rnum; ev->u.feature.rtype = report_type; @@ -497,7 +498,7 @@ static int uhid_dev_feature_answer(struct uhid_device *uhid, spin_lock_irqsave(&uhid->qlock, flags); /* id for old report; drop it silently */ - if (atomic_read(&uhid->report_id) != ev->u.feature_answer.id) + if (uhid->report_id != ev->u.feature_answer.id) goto unlock; if (atomic_read(&uhid->report_done)) goto unlock; |