diff options
| author |   Damien Lespiau <damien.lespiau@intel.com> | 2015-02-05 18:30:20 +0000 |
|---|---|---|
| committer |   Dave Airlie <airlied@redhat.com> | 2015-03-25 10:01:46 +1000 |
| commit | 59a58cb34d3fe73e6c899cc5d9a87428ca662925 (patch) | |
| tree | fdb1d08cae9021959d883f02978bef41caa6aa35 /drivers/gpu | |
| parent | drm: Fixup racy refcounting in plane_force_disable (diff) | |
| download | linux-dev-59a58cb34d3fe73e6c899cc5d9a87428ca662925.tar.xz linux-dev-59a58cb34d3fe73e6c899cc5d9a87428ca662925.zip | |
drm/i915: Don't try to reference the fb in get_initial_plane_config()
Tvrtko noticed a new warning on boot:
WARNING: CPU: 1 PID: 353 at include/linux/kref.h:47 drm_framebuffer_reference+0x6c/0x80 [drm]()
Call Trace:
[<ffffffff8161f10c>] dump_stack+0x4f/0x7b
[<ffffffff81052caa>] warn_slowpath_common+0xaa/0xd0
[<ffffffff81052d8a>] warn_slowpath_null+0x1a/0x20
[<ffffffffa00d035c>] drm_framebuffer_reference+0x6c/0x80 [drm]
[<ffffffffa01c0df7>] update_state_fb.isra.54+0x47/0x50 [i915]
[<ffffffffa01ccd5c>] skylake_get_initial_plane_config+0x93c/0x950 [i915]
[<ffffffffa01e8721>] intel_modeset_init+0x1551/0x17c0 [i915]
[<ffffffffa02476e0>] i915_driver_load+0xed0/0x11e0 [i915]
[<ffffffff81627aa1>] ? _raw_spin_unlock_irqrestore+0x51/0x70
[<ffffffffa00ca8b7>] drm_dev_register+0x77/0x110 [drm]
[<ffffffffa00cda3b>] drm_get_pci_dev+0x11b/0x1f0 [drm]
[<ffffffff81098e3d>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff81627aa1>] ? _raw_spin_unlock_irqrestore+0x51/0x70
[<ffffffffa0145276>] i915_pci_probe+0x56/0x60 [i915]
[<ffffffff813ad59c>] pci_device_probe+0x7c/0x100
[<ffffffff81466aad>] driver_probe_device+0x16d/0x380
We cannot take a reference at this point, not before
intel_framebuffer_init() and the underlying drm_framebuffer_init().
Introduced in:
commit 706dc7b549175e47f23e913b7f1e52874a7d0f56
Author: Matt Roper <matthew.d.roper@intel.com>
Date: Tue Feb 3 13:10:04 2015 -0800
drm/i915: Ensure plane->state->fb stays in sync with plane->fb
v2: Don't move update_state_fb(). It was moved around because I
originally put update_state_fb() in intel_alloc_plane_obj() before
finding a better place. (Matt)
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reported-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From drm-next:
(cherry picked from commit f55548b5af87ebfc586ca75748947f1c1b1a4a52)
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 6d22128d97b1..1c12262029fb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2438,8 +2438,10 @@ intel_find_plane_obj(struct intel_crtc *intel_crtc, if (!intel_crtc->base.primary->fb) return; - if (intel_alloc_plane_obj(intel_crtc, plane_config)) + if (intel_alloc_plane_obj(intel_crtc, plane_config)) { + update_state_fb(intel_crtc->base.primary); return; + } kfree(intel_crtc->base.primary->fb); intel_crtc->base.primary->fb = NULL; @@ -6663,7 +6665,6 @@ i9xx_get_initial_plane_config(struct intel_crtc *crtc, plane_config->size); crtc->base.primary->fb = fb; - update_state_fb(crtc->base.primary); } static void chv_crtc_clock_get(struct intel_crtc *crtc, @@ -7704,7 +7705,6 @@ skylake_get_initial_plane_config(struct intel_crtc *crtc, plane_config->size); crtc->base.primary->fb = fb; - update_state_fb(crtc->base.primary); return; error: @@ -7798,7 +7798,6 @@ ironlake_get_initial_plane_config(struct intel_crtc *crtc, plane_config->size); crtc->base.primary->fb = fb; - update_state_fb(crtc->base.primary); } static bool ironlake_get_pipe_config(struct intel_crtc *crtc, |