Messages in this thread Patch in this message | | | From | Benjamin Tissoires <> | Subject | [PATCH 07/17] HID: logitech-hidpp: return an error if the feature is not present | Date | Tue, 17 Jan 2017 15:35:37 +0100 |
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Or the device just answers a valid feature '0'.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> --- drivers/hid/hid-logitech-hidpp.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index 0c7144f..404b3b8 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -452,6 +452,9 @@ 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]; -- 2.9.3
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