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authorDavid Herrmann <dh.herrmann@gmail.com>2014-07-29 17:14:21 +0200
committerJiri Kosina <jkosina@suse.cz>2014-08-25 03:28:07 -0500
commitfa71f32b5de2be1644ee671ddbe211d79be7847f (patch)
tree2e7e01d5bfe3bde23e1de3275f393b34bcbb793d /drivers/hid
parent5942b849b124c54002346e699f50db3714e300ed (diff)
HID: uhid: add ABI compatible UHID_GET_REPORT replacing UHID_FEATURE
The old hdev->hid_get_raw_report() was broken by design. It was never clear what kind of HW request it should trigger. Benjamin fixed that with the core HID cleanup, though we never really adjusted uhid. Unfortunately, our old UHID_FEATURE command was modelled around the broken hid_get_raw_report(). We converted it silently to the new GET_REPORT and nothing broke. Make this explicit by renaming UHID_FEATURE to UHID_GET_REPORT and UHID_FEATURE_ANSWER to UHID_GET_REPORT_REPLY. Note that this is 100% ABI compatible to UHID_FEATURE. This is just a rename. But we have to keep the old definitions around to not break API. >From now on, UHID_GET_REPORT must trigger a GET_REPORT request on the user-space hardware layer. All the ambiguity due to the weird "feature" name should be gone now. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/uhid.c28
1 files changed, 14 insertions, 14 deletions
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 2d2025a027fe..8f5e46b1bb46 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -124,8 +124,8 @@ static int uhid_hid_parse(struct hid_device *hid)
return hid_parse_report(hid, uhid->rd_data, uhid->rd_size);
}
-static int uhid_hid_get_raw(struct hid_device *hid, unsigned char rnum,
- __u8 *buf, size_t count, unsigned char rtype)
+static int uhid_hid_get_report(struct hid_device *hid, unsigned char rnum,
+ __u8 *buf, size_t count, unsigned char rtype)
{
struct uhid_device *uhid = hid->driver_data;
__u8 report_type;
@@ -133,7 +133,7 @@ static int uhid_hid_get_raw(struct hid_device *hid, unsigned char rnum,
unsigned long flags;
int ret;
size_t uninitialized_var(len);
- struct uhid_feature_answer_req *req;
+ struct uhid_get_report_reply_req *req;
if (!uhid->running)
return -EIO;
@@ -163,10 +163,10 @@ 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 = ++uhid->report_id;
- ev->u.feature.rnum = rnum;
- ev->u.feature.rtype = report_type;
+ ev->type = UHID_GET_REPORT;
+ ev->u.get_report.id = ++uhid->report_id;
+ ev->u.get_report.rnum = rnum;
+ ev->u.get_report.rtype = report_type;
uhid->report_running = true;
uhid_queue(uhid, ev);
@@ -182,7 +182,7 @@ static int uhid_hid_get_raw(struct hid_device *hid, unsigned char rnum,
ret = -ERESTARTSYS;
} else {
spin_lock_irqsave(&uhid->qlock, flags);
- req = &uhid->report_buf.u.feature_answer;
+ req = &uhid->report_buf.u.get_report_reply;
if (req->err) {
ret = -EIO;
@@ -253,7 +253,7 @@ static int uhid_raw_request(struct hid_device *hid, unsigned char reportnum,
{
switch (reqtype) {
case HID_REQ_GET_REPORT:
- return uhid_hid_get_raw(hid, reportnum, buf, len, rtype);
+ return uhid_hid_get_report(hid, reportnum, buf, len, rtype);
case HID_REQ_SET_REPORT:
/* TODO: implement proper SET_REPORT functionality */
return -ENOSYS;
@@ -487,8 +487,8 @@ static int uhid_dev_input2(struct uhid_device *uhid, struct uhid_event *ev)
return 0;
}
-static int uhid_dev_feature_answer(struct uhid_device *uhid,
- struct uhid_event *ev)
+static int uhid_dev_get_report_reply(struct uhid_device *uhid,
+ struct uhid_event *ev)
{
unsigned long flags;
@@ -498,7 +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 (uhid->report_id != ev->u.feature_answer.id)
+ if (uhid->report_id != ev->u.get_report_reply.id)
goto unlock;
if (!uhid->report_running)
goto unlock;
@@ -634,8 +634,8 @@ static ssize_t uhid_char_write(struct file *file, const char __user *buffer,
case UHID_INPUT2:
ret = uhid_dev_input2(uhid, &uhid->input_buf);
break;
- case UHID_FEATURE_ANSWER:
- ret = uhid_dev_feature_answer(uhid, &uhid->input_buf);
+ case UHID_GET_REPORT_REPLY:
+ ret = uhid_dev_get_report_reply(uhid, &uhid->input_buf);
break;
default:
ret = -EOPNOTSUPP;

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