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modesetting: fix crashes caused by udev race conditions

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So the kernel removes the device, and the driver processes the first
udev event, and gets no output back from the kernel, so it check
and don't fall over.

This fixes a couple of crashes seen when hotplugging USB devices.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2013-01-09 12:48:30 +10:00
parent 0b198248ec
commit 8650ff14a5
1 changed files with 5 additions and 0 deletions
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5
hw/xfree86/drivers/modesetting/drmmode_display.c
View file

@ -589,6 +589,8 @@ drmmode_output_detect(xf86OutputPtr output)
drmModeFreeConnector(drmmode_output->mode_output);
drmmode_output->mode_output = drmModeGetConnector(drmmode->fd, drmmode_output->output_id);
if (!drmmode_output->mode_output)
return XF86OutputStatusDisconnected;
switch (drmmode_output->mode_output->connection) {
case DRM_MODE_CONNECTED:
@ -683,6 +685,9 @@ drmmode_output_dpms(xf86OutputPtr output, int mode)
drmModeConnectorPtr koutput = drmmode_output->mode_output;
drmmode_ptr drmmode = drmmode_output->drmmode;
if (!koutput)
return;
drmModeConnectorSetProperty(drmmode->fd, koutput->connector_id,
drmmode_output->dpms_enum_id, mode);
return;