[PATCH v2 07/15] HID: logitech-hidpp: return an error if the feature is not present
From: Benjamin Tissoires <hidden>
Date: 2017-02-02 14:15:48
Also in:
lkml
Subsystem:
hid core layer, hid logitech drivers, hid++ logitech drivers, the rest · Maintainers:
Jiri Kosina, Benjamin Tissoires, Linus Torvalds
Or the device just answers a valid feature '0'. Signed-off-by: Benjamin Tissoires <redacted> --- no changes in v2 --- 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 ef7ef9e..f7b2589 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];
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2.9.3