uvc_ctrl_add_info() calls uvc_ctrl_get_flags() which will override the fixed-up flags set by uvc_ctrl_fixup_xu_info().
uvc_ctrl_init_xu_ctrl() already calls uvc_ctrl_get_flags() before calling uvc_ctrl_add_info(), so the uvc_ctrl_get_flags() call in uvc_ctrl_add_info() is not necessary for xu ctrls.
This commit moves the uvc_ctrl_get_flags() call for normal controls from uvc_ctrl_add_info() to uvc_ctrl_init_ctrl(), so that we no longer call uvc_ctrl_get_flags() twice for xu controls and so that we no longer override the fixed-up flags set by uvc_ctrl_fixup_xu_info().
This fixes the xu motor controls not working properly on a Logitech 046d:08cc, and presumably also on the other Logitech models which have a quirk for this in the uvc_ctrl_fixup_xu_info() function.
Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede hdegoede@redhat.com --- Changes in v2: - Move the uvc_ctrl_get_flags() call for normal controls to uvc_ctrl_init_ctrl() --- drivers/media/usb/uvc/uvc_ctrl.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c index e399b9fad757..b78aba991212 100644 --- a/drivers/media/usb/uvc/uvc_ctrl.c +++ b/drivers/media/usb/uvc/uvc_ctrl.c @@ -2024,13 +2024,6 @@ static int uvc_ctrl_add_info(struct uvc_device *dev, struct uvc_control *ctrl, goto done; }
- /* - * Retrieve control flags from the device. Ignore errors and work with - * default flag values from the uvc_ctrl array when the device doesn't - * properly implement GET_INFO on standard controls. - */ - uvc_ctrl_get_flags(dev, ctrl, &ctrl->info); - ctrl->initialized = 1;
uvc_trace(UVC_TRACE_CONTROL, "Added control %pUl/%u to device %s " @@ -2253,6 +2246,13 @@ static void uvc_ctrl_init_ctrl(struct uvc_device *dev, struct uvc_control *ctrl) if (uvc_entity_match_guid(ctrl->entity, info->entity) && ctrl->index == info->index) { uvc_ctrl_add_info(dev, ctrl, info); + /* + * Retrieve control flags from the device. Ignore errors + * and work with default flag values from the uvc_ctrl + * array when the device doesn't properly implement + * GET_INFO on standard controls. + */ + uvc_ctrl_get_flags(dev, ctrl, &ctrl->info); break; } }