[PATCH xf86-video-ati] modesetting: Check crtc before searching link-status property

[Deucher, Alexander]

> -----Original Message-----
> From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf
> Of Michel Dänzer
> Sent: Wednesday, November 01, 2017 1:43 PM
> To: amd-gfx at lists.freedesktop.org
> Subject: [PATCH xf86-video-ati] modesetting: Check crtc before searching
> link-status property
> 
> From: Daniel Martin <consume.noise at gmail.com>
> 
> No need to lookup the link-status property if we don't have a crtc.
> 
> Signed-off-by: Daniel Martin <consume.noise at gmail.com>
> (Ported from xserver commit 8d7f7e24261e68459e6f0a865e243473f65fe7ad)
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>

Both this and the amdgpu patch are:
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  src/drmmode_display.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/src/drmmode_display.c b/src/drmmode_display.c
> index f57c43647..7ad3235a5 100644
> --- a/src/drmmode_display.c
> +++ b/src/drmmode_display.c
> @@ -2796,12 +2796,14 @@ radeon_mode_hotplug(ScrnInfoPtr scrn,
> drmmode_ptr drmmode)
>  	 */
>  	for (i = 0; i < config->num_output; i++) {
>  		xf86OutputPtr output = config->output[i];
> +		xf86CrtcPtr crtc = output->crtc;
>  		drmmode_output_private_ptr drmmode_output = output-
> >driver_private;
>  		uint32_t con_id;
>  		drmModeConnectorPtr koutput;
> 
> -		if (drmmode_output->mode_output == NULL)
> +		if (!crtc || !drmmode_output->mode_output)
>  			continue;
> +
>  		con_id = drmmode_output->mode_output->connector_id;
>  		/* Get an updated view of the properties for the current
> connector and
>  		 * look for the link-status property
> @@ -2813,10 +2815,6 @@ radeon_mode_hotplug(ScrnInfoPtr scrn,
> drmmode_ptr drmmode)
>  			if (props && props->flags &
> DRM_MODE_PROP_ENUM &&
>  			    !strcmp(props->name, "link-status") &&
>  			    koutput->prop_values[j] ==
> DRM_MODE_LINK_STATUS_BAD) {
> -				xf86CrtcPtr crtc = output->crtc;
> -				if (!crtc)
> -					continue;
> -
>  				/* the connector got a link failure, re-set the
> current mode */
>  				drmmode_set_mode_major(crtc, &crtc-
> >mode, crtc->rotation,
>  						       crtc->x, crtc->y);
> --
> 2.15.0.rc2
> 
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