From: Chris Wilson Date: Mon, 4 Oct 2010 14:33:04 +0000 (+0100) Subject: drm/i915: Avoid circular locking from intel_fbdev_fini() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7b4f3990a22fbe800945f12001bc30db374d0af5;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: Avoid circular locking from intel_fbdev_fini() lockdep spots that the fb_info->lock takes the dev->struct_mutex during init (due to the device probing) and so we can not hold dev->struct_mutex when unregistering the framebuffer. Simply reverse the order of initialisation during cleanup and so do the intel_fbdev_fini() before the intel_modeset_cleanup. Signed-off-by: Chris Wilson --- diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index df86d04f7968..726c3736082f 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -2106,6 +2106,7 @@ int i915_driver_unload(struct drm_device *dev) acpi_video_unregister(); if (drm_core_check_feature(dev, DRIVER_MODESET)) { + intel_fbdev_fini(dev); intel_modeset_cleanup(dev); /* diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f55b560c468f..69c54c5a4254 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6130,8 +6130,6 @@ void intel_modeset_cleanup(struct drm_device *dev) drm_kms_helper_poll_fini(dev); mutex_lock(&dev->struct_mutex); - intel_fbdev_fini(dev); - list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { /* Skip inactive CRTCs */ if (!crtc->fb) diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c index 7af4accafb7f..7dc50acd65d7 100644 --- a/drivers/gpu/drm/i915/intel_fb.c +++ b/drivers/gpu/drm/i915/intel_fb.c @@ -206,8 +206,8 @@ static struct drm_fb_helper_funcs intel_fb_helper_funcs = { .fb_probe = intel_fb_find_or_create_single, }; -static int intel_fbdev_destroy(struct drm_device *dev, - struct intel_fbdev *ifbdev) +static void intel_fbdev_destroy(struct drm_device *dev, + struct intel_fbdev *ifbdev) { struct fb_info *info; struct intel_framebuffer *ifb = &ifbdev->ifb; @@ -225,9 +225,7 @@ static int intel_fbdev_destroy(struct drm_device *dev, drm_framebuffer_cleanup(&ifb->base); if (ifb->obj) - drm_gem_object_unreference(ifb->obj); - - return 0; + drm_gem_object_unreference_unlocked(ifb->obj); } int intel_fbdev_init(struct drm_device *dev)