Hi Ricardo, Thank you for the patch. On Wed, Dec 18, 2024 at 09:39:11PM +0000, Ricardo Ribalda wrote: > If the user sets the nodrop parameter, print a deprecation warning once. > Hopefully they will come to the mailing list if it is an ABI change. > > Now that we have a callback, take this chance to parse the parameter as > a boolean. We still say to userspace that it is a uint to avoid ABI > changes. > > Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > drivers/media/usb/uvc/uvc_driver.c | 19 ++++++++++++++++++- > 1 file changed, 18 insertions(+), 1 deletion(-) > > diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c > index 10812a841587..d8e8675dd2cd 100644 > --- a/drivers/media/usb/uvc/uvc_driver.c > +++ b/drivers/media/usb/uvc/uvc_driver.c > @@ -2424,8 +2424,25 @@ module_param_call(clock, uvc_clock_param_set, uvc_clock_param_get, > MODULE_PARM_DESC(clock, "Video buffers timestamp clock"); > module_param_named(hwtimestamps, uvc_hw_timestamps_param, uint, 0644); > MODULE_PARM_DESC(hwtimestamps, "Use hardware timestamps"); > -module_param_named(nodrop, uvc_no_drop_param, uint, 0644); > + > +static int param_set_nodrop(const char *val, const struct kernel_param *kp) > +{ > + pr_warn_once("uvcvideo: " > + DEPRECATED > + "nodrop parameter will be eventually removed.\n"); > + return param_set_bool(val, kp); > +} > + > +static const struct kernel_param_ops param_ops_nodrop = { > + .set = param_set_nodrop, > + .get = param_get_uint, > +}; > + > +param_check_uint(nodrop, &uvc_no_drop_param); > +module_param_cb(nodrop, ¶m_ops_nodrop, &uvc_no_drop_param, 0644); > +__MODULE_PARM_TYPE(nodrop, "uint"); > MODULE_PARM_DESC(nodrop, "Don't drop incomplete frames"); > + > module_param_named(quirks, uvc_quirks_param, uint, 0644); > MODULE_PARM_DESC(quirks, "Forced device quirks"); > module_param_named(trace, uvc_dbg_param, uint, 0644); -- Regards, Laurent Pinchart