[PATCH xserver] modesetting: Skip no-longer-present connectors when resetting BAD links

[Keith Packard]

Outputs may have NULL mode_output (connector) pointers if the
connector disappears while the server is running. Skip these when
resetting outputs with BAD link status.

Signed-off-by: Keith Packard <keithp at keithp.com>
---
 hw/xfree86/drivers/modesetting/drmmode_display.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/xfree86/drivers/modesetting/drmmode_display.c b/hw/xfree86/drivers/modesetting/drmmode_display.c
index fec7ac276..1c99dd9f9 100644
--- a/hw/xfree86/drivers/modesetting/drmmode_display.c
+++ b/hw/xfree86/drivers/modesetting/drmmode_display.c
@@ -2278,9 +2278,12 @@ drmmode_handle_uevents(int fd, void *closure)
     for (i = 0; i < config->num_output; i++) {
         xf86OutputPtr output = config->output[i];
         drmmode_output_private_ptr drmmode_output = output->driver_private;
-        uint32_t con_id = drmmode_output->mode_output->connector_id;
+        uint32_t con_id;
         drmModeConnectorPtr koutput;
 
+        if (drmmode_output->mode_output == NULL)
+            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
          */
-- 
2.14.1