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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>
This commit is contained in:
Benjamin Tissoires 2013-01-31 17:50:02 +01:00 committed by Jiri Kosina
parent 320cde19a4
commit c284979aff
1 changed files with 12 additions and 1 deletions
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13
drivers/hid/i2c-hid/i2c-hid.c
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@ -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)