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HID: logitech-hidpp: return an error if the queried feature is not present

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Or the device just answers a valid feature '0'.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Benjamin Tissoires 2017-03-27 16:59:32 +02:00 committed by Jiri Kosina
parent a52ec107fa
commit a9525b80fe
1 changed files with 3 additions and 0 deletions
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3
drivers/hid/hid-logitech-hidpp.c
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@ -503,6 +503,9 @@ static int hidpp_root_get_feature(struct hidpp_device *hidpp, u16 feature,
if (ret)
return ret;
if (response.fap.params[0] == 0)
return -ENOENT;
*feature_index = response.fap.params[0];
*feature_type = response.fap.params[1];