On 2020-10-27 at 11:04:17 +0530, Shankar, Uma wrote:
>
>
> > -----Original Message-----
> > From: Anshuman Gupta <anshuman.gu...@intel.com>
> > Sent: Friday, October 23, 2020 5:51 PM
> > To: intel-gfx@lists.freedesktop.org; dri-de...@lists.freedesktop.org
> > Cc: seanp...@chromium.org; Nikula, Jani <jani.nik...@intel.com>; C,
> > Ramalingam <ramalinga...@intel.com>; Li, Juston <juston...@intel.com>;
> > Shankar, Uma <uma.shan...@intel.com>; Gupta, Anshuman
> > <anshuman.gu...@intel.com>
> > Subject: [PATCH v3 02/16] drm/i915/hdcp: Get conn while content_type changed
> >
> > Get DRM connector reference count while scheduling a prop work to avoid any
> > possible destroy of DRM connector when it is in DRM_CONNECTOR_REGISTERED
> > state.
> >
> > Fixes: a6597faa2d59 ("drm/i915: Protect workers against disappearing
> > connectors")
> > Cc: Sean Paul <seanp...@chromium.org>
> > Cc: Ramalingam C <ramalinga...@intel.com>
> > Signed-off-by: Anshuman Gupta <anshuman.gu...@intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_hdcp.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > index 0d9e8d3b5603..42cf91cf4f20 100644
> > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > @@ -2210,6 +2210,7 @@ void intel_hdcp_update_pipe(struct intel_atomic_state
> > *state,
> > if (content_protection_type_changed) {
> > mutex_lock(&hdcp->mutex);
> > hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> > + drm_connector_get(&connector->base);
>
> Where are releasing this ref.
Thanks Uma for review the releasing ref is present in prop work function.
intel_hdcp_prop_work().
As prop function releases the ref for connector somtimes it lead to destroy
the connector, if we schedule the prop work without taking any connector
reference.
Thanks,
Anshuman Gupta.
>
> > schedule_work(&hdcp->prop_work);
> > mutex_unlock(&hdcp->mutex);
> > }
> > --
> > 2.26.2
>
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