On Fri, Sep 15, 2017 at 11:09 AM, Ville Syrjälä
<ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> On Fri, Sep 15, 2017 at 10:49:09AM -0700, James Ausmus wrote:
>> Make intel_dp_add_mst_connector handle error returns from the drm_ calls.
>> Add intel_connector_free to support cleanup on the error path.
>>
>> v2: Rename new function to avoid confusion, and simplify error
>> paths (Ville)
>>
>> Signed-off-by: James Ausmus <james.ausmus@xxxxxxxxx>
>> ---
>>
>> Note that this patch is compile/boot tested only on non-MST, as I
>> currently don't have MST-enabled HW.
>>
>> drivers/gpu/drm/i915/intel_display.c | 10 ++++++++++
>> drivers/gpu/drm/i915/intel_dp_mst.c | 23 +++++++++++++++++++----
>> drivers/gpu/drm/i915/intel_drv.h | 1 +
>> 3 files changed, 30 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>> index 8599e425abb1..e3b1a6ead4fb 100644
>> --- a/drivers/gpu/drm/i915/intel_display.c
>> +++ b/drivers/gpu/drm/i915/intel_display.c
>> @@ -6146,6 +6146,16 @@ struct intel_connector *intel_connector_alloc(void)
>> return connector;
>> }
>>
>> +/*
>> + * Free the bits allocated by intel_connector_alloc.
>> + * Type-specific connector cleanup should be done prior to this.
>> + */
>> +void intel_connector_free(struct intel_connector *connector)
>> +{
>> + kfree(to_intel_digital_connector_state(connector->base.state));
>> + kfree(connector);
>> +}
>> +
>> /* Simple connector->get_hw_state implementation for encoders that support only
>> * one connector and no cloning and hence the encoder state determines the state
>> * of the connector. */
>> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
>> index 8e3aad0ea60b..6e4447cbbe0e 100644
>> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
>> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
>> @@ -451,14 +451,18 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
>> struct drm_device *dev = intel_dig_port->base.base.dev;
>> struct intel_connector *intel_connector;
>> struct drm_connector *connector;
>> - int i;
>> + int i, ret;
>>
>> intel_connector = intel_connector_alloc();
>> if (!intel_connector)
>> return NULL;
>>
>> connector = &intel_connector->base;
>> - drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
>> + ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
>> + DRM_MODE_CONNECTOR_DisplayPort);
>> + if (ret)
>> + goto out_init;
>> +
>> drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
>>
>> intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
>> @@ -466,14 +470,25 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
>> intel_connector->port = port;
>>
>> for (i = PIPE_A; i <= PIPE_C; i++) {
>
> BTW a followup patch to switch these mst_encoders[] loops over
> to for_each_pipe() might be nice.
I'll queue that one up as well :)
>
>> - drm_mode_connector_attach_encoder(&intel_connector->base,
>> + ret = drm_mode_connector_attach_encoder(&intel_connector->base,
>> &intel_dp->mst_encoders[i]->base.base);
>
> Please reindent appropriately.
Done
>
>> + if (ret)
>> + goto out_conn;
>> }
>>
>> drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
>> drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
>>
>> - drm_mode_connector_set_path_property(connector, pathprop);
>> + ret = drm_mode_connector_set_path_property(connector, pathprop);
>> + if (ret == 0)
>> + return connector;
>
> if (ret)
> goto ...;
>
> return connector;
>
> is more idiomatic.
Done
>
>> +
>> +out_conn:
>> + drm_connector_cleanup(connector);
>> +out_init:
>> + intel_connector_free(intel_connector);
>
> Hmm. I might call these out_cleanup and out_free. But I guess we have no
> consistent style when it comes to goto labes. So feel free to ignore me.
Sounds good to me - done :)
>
>> + connector = NULL;
>> +
>> return connector;
>
> Just return NULL.
Done
Thanks for the review!
>
>> }
>>
>> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
>> index 307807672896..2a5cee4302f7 100644
>> --- a/drivers/gpu/drm/i915/intel_drv.h
>> +++ b/drivers/gpu/drm/i915/intel_drv.h
>> @@ -1358,6 +1358,7 @@ void intel_pps_unlock_regs_wa(struct drm_i915_private *dev_priv);
>> void intel_encoder_destroy(struct drm_encoder *encoder);
>> int intel_connector_init(struct intel_connector *);
>> struct intel_connector *intel_connector_alloc(void);
>> +void intel_connector_free(struct intel_connector *connector);
>> bool intel_connector_get_hw_state(struct intel_connector *connector);
>> void intel_connector_attach_encoder(struct intel_connector *connector,
>> struct intel_encoder *encoder);
>> --
>> 2.14.1
>>
>> _______________________________________________
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>> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Ville Syrjälä
> Intel OTC
--
James Ausmus
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