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xfree86: return NULL for compat output if no outputs. 

With outputless GPUs showing up we crash here if there are not outputs
try and recover with a bit of grace.

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Dave Airlie 2013-10-29 12:09:26 -04:00 committed by Keith Packard
parent d7ee27e5e4
commit d1440783a7
1 changed files with 3 additions and 0 deletions
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3
hw/xfree86/modes/xf86Crtc.c
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@ -1863,6 +1863,9 @@ SetCompatOutput(xf86CrtcConfigPtr config)
DisplayModePtr maxmode = NULL, testmode, mode; DisplayModePtr maxmode = NULL, testmode, mode;
int o, compat = -1, count, mincount = 0; int o, compat = -1, count, mincount = 0;
if (config->num_output == 0)
return NULL;
/* Look for one that's definitely connected */ /* Look for one that's definitely connected */
for (o = 0; o < config->num_output; o++) { for (o = 0; o < config->num_output; o++) {
test = config->output[o]; test = config->output[o];