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| author | Benjamin Tissoires <benjamin.tissoires@gmail.com> | 2013-01-31 20:50:02 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-01-31 20:57:53 +0400 |
| commit | c284979affcc6870a9a6545fc4b1adb3816dfcbf (patch) | |
| tree | 66e97688610f6017627d46694363cb162a8f70ba | |
| parent | 320cde19a4e8f122b19d2df7a5c00636e11ca3fb (diff) | |
| download | linux-c284979affcc6870a9a6545fc4b1adb3816dfcbf.tar.xz | |
HID: i2c-hid: fix i2c_hid_output_raw_report
i2c_hid_output_raw_report is used by hidraw to forward set_report requests.
The current implementation of i2c_hid_set_report needs to take the
report_id as an argument. The report_id is stored in the first byte
of the buffer in argument of i2c_hid_output_raw_report.
Not removing the report_id from the given buffer adds this byte 2 times
in the command, leading to a non working command.
Reported-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index 9ef222442ca0..5774ebf4298c 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -540,13 +540,24 @@ static int i2c_hid_output_raw_report(struct hid_device *hid, __u8 *buf, { struct i2c_client *client = hid->driver_data; int report_id = buf[0]; + int ret; if (report_type == HID_INPUT_REPORT) return -EINVAL; - return i2c_hid_set_report(client, + if (report_id) { + buf++; + count--; + } + + ret = i2c_hid_set_report(client, report_type == HID_FEATURE_REPORT ? 0x03 : 0x02, report_id, buf, count); + + if (report_id && ret >= 0) + ret++; /* add report_id to the number of transfered bytes */ + + return ret; } static int i2c_hid_parse(struct hid_device *hid) |