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authorClint Taylor <clinton.a.taylor@intel.com>2017-01-18 13:38:43 -0800
committerChris Wilson <chris@chris-wilson.co.uk>2017-01-19 08:48:10 +0000
commit5b8cd0755f8a06a851c436a013e7be0823fb155a (patch)
treec23dd7b28a8a545dd187d45c74fd3a1091bd5550 /drivers
parent1e5a15d65d4cecb553d7e81c3ac05b1ffbc4bb27 (diff)
drm/i915: prevent crash with .disable_display parameter
The .disable_display parameter was causing a fatal crash when fbdev was dereferenced during driver init. V1: protection in i915_drv.c V2: Moved protection to intel_fbdev.c Fixes: 43cee314345a ("drm/i915/fbdev: Limit the global async-domain synchronization") Testcase: igt/drv_module_reload/basic-no-display Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484775523-29428-1-git-send-email-clinton.a.taylor@intel.com Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Lukas Wunner <lukas@wunner.de> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: <stable@vger.kernel.org> # v4.8+ Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/i915/intel_fbdev.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index bdefa61f2e60..bb0e9bf80e45 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -742,6 +742,9 @@ void intel_fbdev_initial_config_async(struct drm_device *dev)
{
struct intel_fbdev *ifbdev = to_i915(dev)->fbdev;
+ if (!ifbdev)
+ return;
+
ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev);
}