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drm/i915/dsb: fix cmd_buf being wrongly set

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The "err" label is not really "err", but rather "out" since the return
path is shared between error condition and normal path. This broke when
commit 03cea61076 ("drm/i915/dsb: fix extra warning on error path
handling") added a "dsb->cmd_buf = NULL;" there, making DSB to stop
working since now all writes would pass-through via mmio.

Remove the set to NULL since it's actually not needed: we only set it if
all steps are successful. While at it, rename the label so this confusion
doesn't happen again.

Fixes: 03cea61076 ("drm/i915/dsb: fix extra warning on error path handling")
Resolves: https://gitlab.freedesktop.org/drm/intel/issues/8
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191127221119.384754-1-lucas.demarchi@intel.com
This commit is contained in:
Lucas De Marchi
2019-11-27 14:11:21 -08:00
parent ca851c2248
commit 13caf7bea4
1 changed files with 9 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/gpu/drm/i915/display/intel_dsb.c
+9 -9
View File
@@ -116,34 +116,34 @@ intel_dsb_get(struct intel_crtc *crtc)
obj = i915_gem_object_create_internal(i915, DSB_BUF_SIZE);
if (IS_ERR(obj)) {
DRM_ERROR("Gem object creation failed\n");
goto err;
goto out;
}
vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0, 0);
if (IS_ERR(vma)) {
DRM_ERROR("Vma creation failed\n");
i915_gem_object_put(obj);
goto err;
goto out;
}
buf = i915_gem_object_pin_map(vma->obj, I915_MAP_WC);
if (IS_ERR(buf)) {
DRM_ERROR("Command buffer creation failed\n");
goto err;
goto out;
}
dsb->id = DSB1;
dsb->vma = vma;
dsb->cmd_buf = buf;
err:
out:
/*
* Set cmd_buf to NULL so the writes pass-through, but leave the
* dangling refcount to be removed later by the corresponding
* intel_dsb_put(): the important error message will already be
* logged above.
* On error dsb->cmd_buf will continue to be NULL, making the writes
* pass-through. Leave the dangling ref to be removed later by the
* corresponding intel_dsb_put(): the important error message will
* already be logged above.
*/
dsb->cmd_buf = NULL;
intel_runtime_pm_put(&i915->runtime_pm, wakeref);
return dsb;