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| author |   Clint Taylor <clinton.a.taylor@intel.com> | 2017-01-18 13:38:43 -0800 |
|---|---|---|
| committer |   Jani Nikula <jani.nikula@intel.com> | 2017-01-25 12:42:16 +0200 |
| commit | 27892bbdc9233f33bf0f44e08aab8f12e0dec142 (patch) | |
| tree | e12c45fb882f0d5410673656991e71d5e22efdf2 /drivers/gpu/drm/i915 | |
| parent | drm/i915: Avoid drm_atomic_state_put(NULL) in intel_display_resume (diff) | |
| download | linux-dev-27892bbdc9233f33bf0f44e08aab8f12e0dec142.tar.xz linux-dev-27892bbdc9233f33bf0f44e08aab8f12e0dec142.zip | |
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>
(cherry picked from commit 5b8cd0755f8a06a851c436a013e7be0823fb155a)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_fbdev.c | 3 |
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 beb08982dc0b..8cf2d80f2254 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); } |