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| author | Mathieu Magnaudet <mathieu.magnaudet@gmail.com> | 2014-11-27 16:02:36 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2014-12-01 21:34:17 +0100 |
| commit | dabb05c6670e6e4415d7b56cd5864a5dbd90207f (patch) | |
| tree | ca80d7c8cf44f32bb0c870855ae87452c8a004c3 /include/linux/hid.h | |
| parent | da10bc252476a8d1d1bdf7b94502ad2cbd7f30b1 (diff) | |
| download | lwn-dabb05c6670e6e4415d7b56cd5864a5dbd90207f.tar.gz lwn-dabb05c6670e6e4415d7b56cd5864a5dbd90207f.zip | |
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>
Diffstat (limited to 'include/linux/hid.h')
| -rw-r--r-- | include/linux/hid.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/hid.h b/include/linux/hid.h index 78ea9bf941cd..2366fda010c8 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -1063,6 +1063,17 @@ static inline void hid_hw_wait(struct hid_device *hdev) 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); |