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| author | Hans de Goede <hdegoede@redhat.com> | 2020-03-15 18:34:49 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2020-03-17 21:48:48 +0100 |
| commit | b8a75eaddae9410767c7d95a1c5f3a547aae7b81 (patch) | |
| tree | 3a0d6884784aeebca47c975d4788eed006ce55eb /drivers/hid | |
| parent | 819d578d51d0ce73f06e35d69395ef55cd683a74 (diff) | |
| download | linux-b8a75eaddae9410767c7d95a1c5f3a547aae7b81.tar.gz linux-b8a75eaddae9410767c7d95a1c5f3a547aae7b81.tar.bz2 linux-b8a75eaddae9410767c7d95a1c5f3a547aae7b81.zip | |
HID: lg-g15: Do not fail the probe when we fail to disable F# emulation
By default the G1-G12 keys on the Logitech gaming keyboards send
F1 - F12 when in "generic HID" mode.
The first thing the hid-lg-g15 driver does is disable this behavior.
We have received a bugreport that this does not work when the keyboard
is connected through an Aten KVM switch. Using a gaming keyboard with
a KVM is a bit weird setup, but still we can try to fail a bit more
gracefully here.
On the G510 keyboards the same USB-interface which is used for the gaming
keys is also used for the media-keys. Before this commit we would call
hid_hw_stop() on failure to disable the F# emulation and then exit the
probe method with an error code.
This not only causes us to not handle the gaming-keys, but this also
breaks the media keys which is a regression compared to the situation
when these keyboards where handled by the generic hidinput driver.
This commit changes the error handling to clear the hiddev drvdata
(to disable our .raw_event handler) and then returning from the probe
method with success.
The net result of this is that, when connected through a KVM, things
work as well as they did before the hid-lg-g15 driver was introduced.
Fixes: ad4203f5a243 ("HID: lg-g15: Add support for the G510 keyboards' gaming keys")
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1806321
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/hid-lg-g15.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/hid/hid-lg-g15.c b/drivers/hid/hid-lg-g15.c index 8a9268a5c66a..ad4b5412a9f4 100644 --- a/drivers/hid/hid-lg-g15.c +++ b/drivers/hid/hid-lg-g15.c @@ -803,8 +803,10 @@ static int lg_g15_probe(struct hid_device *hdev, const struct hid_device_id *id) } if (ret < 0) { - hid_err(hdev, "Error disabling keyboard emulation for the G-keys\n"); - goto error_hw_stop; + hid_err(hdev, "Error %d disabling keyboard emulation for the G-keys, falling back to generic hid-input driver\n", + ret); + hid_set_drvdata(hdev, NULL); + return 0; } /* Get initial brightness levels */ |