HID: make hid_report_len as a static inline function in hid.h
In several hid drivers it is necessary to calculate the length of an
hid_report. This patch exports the existing static function hid_report_len of
hid-core.c as an inline function in hid.h
Signed-off-by: Mathieu Magnaudet <mathieu.magnaudet@enac.fr>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 3402033..ee6ba76 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1280,12 +1280,6 @@
}
EXPORT_SYMBOL_GPL(hid_output_report);
-static int hid_report_len(struct hid_report *report)
-{
- /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
- return ((report->size - 1) >> 3) + 1 + (report->id > 0);
-}
-
/*
* Allocator for buffer that is going to be passed to hid_output_report()
*/
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 725f22c..1e95f4d 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1215,7 +1215,7 @@
return hid->ll_driver->request(hid, report, HID_REQ_SET_REPORT);
/* fall back to generic raw-output-report */
- len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
+ len = hid_report_len(report);
buf = hid_alloc_report_buf(report, GFP_KERNEL);
if (!buf)
return;
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 683cda6..f65e78b 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -827,7 +827,7 @@
r = re->report_id_hash[td->inputmode];
if (r) {
if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
- report_len = ((r->size - 1) >> 3) + 1 + (r->id > 0);
+ report_len = hid_report_len(r);
buf = hid_alloc_report_buf(r, GFP_KERNEL);
if (!buf) {
hid_err(hdev, "failed to allocate buffer for report\n");
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index ca6849a..b6cb7a5 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -338,8 +338,7 @@
report = usbhid->out[usbhid->outtail].report;
raw_report = usbhid->out[usbhid->outtail].raw_report;
- usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) +
- 1 + (report->id > 0);
+ usbhid->urbout->transfer_buffer_length = hid_report_len(report);
usbhid->urbout->dev = hid_to_usb_dev(hid);
if (raw_report) {
memcpy(usbhid->outbuf, raw_report,
diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 8593047..8e02a4a 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -1321,12 +1321,6 @@
features->unitExpo);
}
-static int wacom_hid_report_len(struct hid_report *report)
-{
- /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
- return ((report->size - 1) >> 3) + 1 + (report->id > 0);
-}
-
static size_t wacom_compute_pktlen(struct hid_device *hdev)
{
struct hid_report_enum *report_enum;
@@ -1336,7 +1330,7 @@
report_enum = hdev->report_enum + HID_INPUT_REPORT;
list_for_each_entry(report, &report_enum->report_list, list) {
- size_t report_size = wacom_hid_report_len(report);
+ size_t report_size = hid_report_len(report);
if (report_size > size)
size = report_size;
}
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 78ea9bf..2366fda 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -1063,6 +1063,17 @@
hdev->ll_driver->wait(hdev);
}
+/**
+ * hid_report_len - calculate the report length
+ *
+ * @report: the report we want to know the length
+ */
+static inline int hid_report_len(struct hid_report *report)
+{
+ /* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
+ return ((report->size - 1) >> 3) + 1 + (report->id > 0);
+}
+
int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
int interrupt);