diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2018-03-19 21:53:26 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2018-04-26 14:33:35 +0200 |
| commit | 605f077290a594c75a952ad3b78e53d68c1895ae (patch) | |
| tree | 7188e316fd6a492f4097faad80ff8a7586bd2bd4 /drivers/hid/hid-alps.c | |
| parent | 4d1890531413a19d63cb980fee6d9d3ff86d97ad (diff) | |
HID: alps: Report an error if we receive invalid data in 't4_read_write_register()'
If the data received is not what is expected, we should return an error.
Otherwise, we return 0 or a positive value which will be interpreted as
success, but '*read_val' has not been updated.
Fixes: 73196ebe134d ("HID: alps: add support for Alps T4 Touchpad device")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-alps.c')
| -rw-r--r-- | drivers/hid/hid-alps.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c index b1eeb4839bfc..925396fdf0d9 100644 --- a/drivers/hid/hid-alps.c +++ b/drivers/hid/hid-alps.c @@ -219,6 +219,8 @@ static int t4_read_write_register(struct hid_device *hdev, u32 address, goto exit_readbuf; } + ret = -EINVAL; + if (*(u32 *)&readbuf[6] != address) { dev_err(&hdev->dev, "read register address error (%x,%x)\n", *(u32 *)&readbuf[6], address); |