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drm/i915: Call i915_perf_fini() on init_hw error unwind

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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: 9f9b2792b6 ("drm/i915/perf: reuse timestamp frequency from device info")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180414091233.32224-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-04-14 10:12:33 +01:00
parent f4ecfbfc32
commit 9f172f6fbd
1 changed files with 15 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/gpu/drm/i915/i915_drv.c
View File

@ -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;
}