drm/i915/guc: Verify result from CTB (de)register action

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In commit b839a869df ("drm/i915/guc: Add support for data
reporting in GuC responses") we missed the hypothetical case
that GuC might return positive non-zero value as success data.

While that would be lucky treated as error case, and at the
end will result in reporting valid -EIO, in the meantime this
value will be passed to ERR_PTR that could be misleading.

v2: rebased

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210926184545.1407-2-michal.wajdeczko@intel.com

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This commit is contained in:

Michal Wajdeczko 2021-09-26 20:45:42 +02:00 • committed by Matt Roper

parent 9eddd5a9a2

commit 217ecd310d

1 changed files with 8 additions and 2 deletions

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drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c

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