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From: Anshuman Gupta <anshuman.gupta@intel.com>
To: "Shankar, Uma" <uma.shankar@intel.com>
Cc: "Nikula, Jani" <jani.nikula@intel.com>,
	"intel-gfx@lists.freedesktop.org"
	<intel-gfx@lists.freedesktop.org>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>,
	"seanpaul@chromium.org" <seanpaul@chromium.org>
Subject: Re: [Intel-gfx] [PATCH v3 02/16] drm/i915/hdcp: Get conn while content_type changed
Date: Tue, 27 Oct 2020 11:07:39 +0530	[thread overview]
Message-ID: <20201027053737.GB29526@intel.com> (raw)
In-Reply-To: <447146c6e1034f7fb03c57f9e35d18d4@intel.com>

On 2020-10-27 at 11:04:17 +0530, Shankar, Uma wrote:
> 
> 
> > -----Original Message-----
> > From: Anshuman Gupta <anshuman.gupta@intel.com>
> > Sent: Friday, October 23, 2020 5:51 PM
> > To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org
> > Cc: seanpaul@chromium.org; Nikula, Jani <jani.nikula@intel.com>; C,
> > Ramalingam <ramalingam.c@intel.com>; Li, Juston <juston.li@intel.com>;
> > Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman
> > <anshuman.gupta@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 <seanpaul@chromium.org>
> > Cc: Ramalingam C <ramalingam.c@intel.com>
> > Signed-off-by: Anshuman Gupta <anshuman.gupta@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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  reply	other threads:[~2020-10-27  5:51 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-23 12:20 [Intel-gfx] [PATCH v3 00/16] HDCP 2.2 and HDCP 1.4 Gen12 DP MST support Anshuman Gupta
2020-10-23 12:20 ` [Intel-gfx] [PATCH v3 01/16] drm/i915/hdcp: Update CP property in update_pipe Anshuman Gupta
2020-10-27  5:32   ` Shankar, Uma
2020-10-27  7:50     ` Anshuman Gupta
2020-10-23 12:20 ` [Intel-gfx] [PATCH v3 02/16] drm/i915/hdcp: Get conn while content_type changed Anshuman Gupta
2020-10-27  5:34   ` Shankar, Uma
2020-10-27  5:37     ` Anshuman Gupta [this message]
2020-10-23 12:20 ` [Intel-gfx] [PATCH v3 03/16] drm/i915/hotplug: Handle CP_IRQ for DP-MST Anshuman Gupta
2020-10-27  5:43   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 04/16] drm/i915/hdcp: DP MST transcoder for link and stream Anshuman Gupta
2020-10-27  5:49   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 05/16] drm/i915/hdcp: Move HDCP enc status timeout to header Anshuman Gupta
2020-10-27  5:52   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 06/16] drm/i915/hdcp: HDCP stream encryption support Anshuman Gupta
2020-10-27  6:20   ` Shankar, Uma
2020-10-27  7:46     ` Anshuman Gupta
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 07/16] drm/i915/hdcp: Enable Gen12 HDCP 1.4 DP MST support Anshuman Gupta
2020-10-27  6:29   ` Shankar, Uma
2020-10-27  7:57     ` Anshuman Gupta
2020-10-27 12:04     ` Anshuman Gupta
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 08/16] drm/i915/hdcp: Pass dig_port to intel_hdcp_init Anshuman Gupta
2020-10-27  6:30   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 09/16] drm/i915/hdcp: Encapsulate hdcp_port_data to dig_port Anshuman Gupta
2020-10-27  6:34   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 10/16] misc/mei/hdcp: Fix AUTH_STREAM_REQ cmd buffer len Anshuman Gupta
2020-10-27  6:36   ` Shankar, Uma
2020-10-27  6:39     ` Winkler, Tomas
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 11/16] drm/hdcp: Max MST content streams Anshuman Gupta
2020-10-27  6:41   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 12/16] drm/i915/hdcp: MST streams support in hdcp port_data Anshuman Gupta
2020-10-27  6:55   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 13/16] drm/i915/hdcp: Pass connector to check_2_2_link Anshuman Gupta
2020-10-27  6:57   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 14/16] drm/i915/hdcp: Add HDCP 2.2 stream register Anshuman Gupta
2020-10-27  7:11   ` Shankar, Uma
2020-10-27  8:57     ` Anshuman Gupta
2020-10-27  9:50       ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 15/16] drm/i915/hdcp: Support for HDCP 2.2 MST shim callbacks Anshuman Gupta
2020-10-27  7:20   ` Shankar, Uma
2020-10-23 12:21 ` [Intel-gfx] [PATCH v3 16/16] drm/i915/hdcp: Enable HDCP 2.2 MST support Anshuman Gupta
2020-10-27  7:24   ` Shankar, Uma
2020-10-23 14:41 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for HDCP 2.2 and HDCP 1.4 Gen12 DP " Patchwork
2020-10-23 14:42 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2020-10-23 15:07 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2020-10-23 18:54 ` [Intel-gfx] ✗ Fi.CI.IGT: failure " Patchwork
  -- strict thread matches above, loose matches on Subject: below --
2020-10-22  8:55 [Intel-gfx] [PATCH v3 00/16] HDCP 2.2 DP MST Support Anshuman Gupta
2020-10-22  8:55 ` [Intel-gfx] [PATCH v3 02/16] drm/i915/hdcp: Get conn while content_type changed Anshuman Gupta

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