From 9f172f6fbd243759c808d97bd83c95e49325b2c9 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sat, 14 Apr 2018 10:12:33 +0100 Subject: [PATCH] drm/i915: Call i915_perf_fini() on init_hw error unwind We have to cleanup after i915_perf_init(), even on the error path, as it passes a pointer into the module to the sysfs core. If we fail to unregister the sysctl table, we leave a dangling pointer which then may explode anytime later. Fixes: 9f9b2792b6d3 ("drm/i915/perf: reuse timestamp frequency from device info") Signed-off-by: Chris Wilson Cc: Lionel Landwerlin Cc: Matthew Auld Reviewed-by: Lionel Landwerlin Reviewed-by: Michal Wajdeczko Link: https://patchwork.freedesktop.org/patch/msgid/20180414091233.32224-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/i915_drv.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index f770be18b2d7..840020681985 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1101,30 +1101,32 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv) ret = i915_ggtt_probe_hw(dev_priv); if (ret) - return ret; + goto err_perf; - /* WARNING: Apparently we must kick fbdev drivers before vgacon, - * otherwise the vga fbdev driver falls over. */ + /* + * WARNING: Apparently we must kick fbdev drivers before vgacon, + * otherwise the vga fbdev driver falls over. + */ ret = i915_kick_out_firmware_fb(dev_priv); if (ret) { DRM_ERROR("failed to remove conflicting framebuffer drivers\n"); - goto out_ggtt; + goto err_ggtt; } ret = i915_kick_out_vgacon(dev_priv); if (ret) { DRM_ERROR("failed to remove conflicting VGA console\n"); - goto out_ggtt; + goto err_ggtt; } ret = i915_ggtt_init_hw(dev_priv); if (ret) - return ret; + goto err_ggtt; ret = i915_ggtt_enable_hw(dev_priv); if (ret) { DRM_ERROR("failed to enable GGTT\n"); - goto out_ggtt; + goto err_ggtt; } pci_set_master(pdev); @@ -1135,7 +1137,7 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv) if (ret) { DRM_ERROR("failed to set DMA mask\n"); - goto out_ggtt; + goto err_ggtt; } } @@ -1153,7 +1155,7 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv) if (ret) { DRM_ERROR("failed to set DMA mask\n"); - goto out_ggtt; + goto err_ggtt; } } @@ -1186,13 +1188,14 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv) ret = intel_gvt_init(dev_priv); if (ret) - goto out_ggtt; + goto err_ggtt; return 0; -out_ggtt: +err_ggtt: i915_ggtt_cleanup_hw(dev_priv); - +err_perf: + i915_perf_fini(dev_priv); return ret; } -- GitLab