Paulo Zanoni 2ebfaf5f10 drm/i915: call drm_vblank_cleanup() earlier at unload ... In its current place, it just segfaults while trying to access the CRTC structures: [ 9132.421681] Call Trace: [ 9132.421707] [<ffffffffa01130d8>] i915_get_crtc_scanoutpos+0x1e8/0x220 [i915] [ 9132.421727] [<ffffffffa001da34>] drm_calc_vbltimestamp_from_scanoutpos+0x94/0x330 [drm] [ 9132.421744] [<ffffffffa001d240>] ?vblank_disable_and_save+0x40/0x1e0 [drm] [ 9132.421769] [<ffffffffa0114328>] i915_get_vblank_timestamp+0x68/0xb0 [i915] [ 9132.421786] [<ffffffffa001d094>] drm_get_last_vbltimestamp+0x44/0x80 [drm] [ 9132.421801] [<ffffffffa001d3a6>] vblank_disable_and_save+0x1a6/0x1e0 [drm] [ 9132.421817] [<ffffffffa001eac1>] drm_vblank_cleanup+0x61/0xa0 [drm] [ 9132.421849] [<ffffffffa0177a5e>] i915_driver_unload+0xde/0x290 [i915] [ 9132.421867] [<ffffffffa0020264>] drm_dev_unregister+0x24/0xb0 [drm] [ 9132.421884] [<ffffffffa002090e>] drm_put_dev+0x1e/0x70 [drm] [ 9132.421901] [<ffffffffa00e01e0>] i915_pci_remove+0x10/0x20 [i915] [ 9132.421910] [<ffffffff81347556>] pci_device_remove+0x36/0xb0 [ 9132.421920] [<ffffffff8140084a>] __device_release_driver+0x7a/0xf0 [ 9132.421928] [<ffffffff81400fc8>] driver_detach+0xb8/0xc0 [ 9132.421936] [<ffffffff8140054a>] bus_remove_driver+0x4a/0xb0 [ 9132.421944] [<ffffffff81401717>] driver_unregister+0x27/0x50 [ 9132.421953] [<ffffffff81346f65>] pci_unregister_driver+0x25/0x70 [ 9132.421971] [<ffffffffa00229c8>] drm_pci_exit+0x78/0xa0 [drm] [ 9132.422000] [<ffffffffa017a6d2>] i915_exit+0x20/0x94e [i915] [ 9132.422009] [<ffffffff810fb9dc>] SyS_delete_module+0x13c/0x1f0 [ 9132.422019] [<ffffffff8131c5fb>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 9132.422028] [<ffffffff816f7792>] system_call_fastpath+0x16/0x1b This means it has to be before intel_modeset_cleanup, which cleans the CRTC structures. But if we move it to before intel_fbdev_fini(), we get WARNs because intel_fbdev_fini() still tries to use the vblanks, so the only acceptable point for drm_vblank_cleanup() seems to be this place. Related commit: commit cbb47d179f Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon Sep 23 17:33:20 2013 -0300 drm/i915: Add some missing steps to i915_driver_load error path Testsuite: igt/drv_module_reload Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77511 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83484 Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>		2014-10-24 16:34:10 +02:00
..
drm	drm/i915: call drm_vblank_cleanup() earlier at unload	2014-10-24 16:34:10 +02:00
host1x	drm/tegra: Make job submission 64-bit safe	2014-08-04 10:07:36 +02:00
ipu-v3	gpu: ipu-v3: Add ipu_dump()	2014-09-02 14:55:56 +02:00
vga	vgaarb: We can own non-decoded resources	2014-07-08 11:15:09 +10:00
Makefile	gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging	2014-06-04 11:06:52 +02:00