Messages in this thread | | | Date | Wed, 12 Apr 2023 11:50:44 +0300 | From | Laurent Pinchart <> | Subject | Re: [PATCH] drm/omap: dsi: Fix deferred probe warnings |
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Hi Tony,
Thank you for the patch.
On Wed, Apr 12, 2023 at 10:39:53AM +0300, Tony Lindgren wrote: > We may not have dsi->dsidev initialized during probe, and that can > lead into various dsi related warnings as omap_dsi_host_detach() gets > called with dsi->dsidev set to NULL. > > The warnings can be "Fixed dependency cycle(s)" followed by a > WARNING: CPU: 0 PID: 787 at drivers/gpu/drm/omapdrm/dss/dsi.c:4414.
How can this happen ? I assume .detach() can't be called without a priori successful call to .attach(), that that sets dsi->dsidev.
> Let's fix the warnings by checking for a valid dsi->dsidev. > > Signed-off-by: Tony Lindgren <tony@atomide.com> > --- > drivers/gpu/drm/omapdrm/dss/dsi.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c > --- a/drivers/gpu/drm/omapdrm/dss/dsi.c > +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c > @@ -4411,7 +4411,7 @@ static int omap_dsi_host_detach(struct mipi_dsi_host *host, > { > struct dsi_data *dsi = host_to_omap(host); > > - if (WARN_ON(dsi->dsidev != client)) > + if (dsi->dsidev && WARN_ON(dsi->dsidev != client)) > return -EINVAL; > > cancel_delayed_work_sync(&dsi->dsi_disable_work);
-- Regards,
Laurent Pinchart
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