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| author | Michal Wajdeczko <michal.wajdeczko@intel.com> | 2021-09-26 20:45:42 +0200 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2021-10-01 12:04:23 -0700 |
| commit | 217ecd310d56cca0bfd7c3ee1ff1deafae4ffed1 (patch) | |
| tree | e1f29c1dac018c5911d47a5471d3b04ca77d641f | |
| parent | 9eddd5a9a2aee15d4f0c701388cbdea70e49c6a9 (diff) | |
| download | linux-217ecd310d56cca0bfd7c3ee1ff1deafae4ffed1.tar.gz | |
drm/i915/guc: Verify result from CTB (de)register action
In commit b839a869dfc9 ("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
| -rw-r--r-- | drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c index 20c710a74498..c39abb010181 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c @@ -168,12 +168,15 @@ static int guc_action_register_ct_buffer(struct intel_guc *guc, u32 type, FIELD_PREP(HOST2GUC_REGISTER_CTB_REQUEST_MSG_2_DESC_ADDR, desc_addr), FIELD_PREP(HOST2GUC_REGISTER_CTB_REQUEST_MSG_3_BUFF_ADDR, buff_addr), }; + int ret; GEM_BUG_ON(type != GUC_CTB_TYPE_HOST2GUC && type != GUC_CTB_TYPE_GUC2HOST); GEM_BUG_ON(size % SZ_4K); /* CT registration must go over MMIO */ - return intel_guc_send_mmio(guc, request, ARRAY_SIZE(request), NULL, 0); + ret = intel_guc_send_mmio(guc, request, ARRAY_SIZE(request), NULL, 0); + + return ret > 0 ? -EPROTO : ret; } static int ct_register_buffer(struct intel_guc_ct *ct, u32 type, @@ -201,11 +204,14 @@ static int guc_action_deregister_ct_buffer(struct intel_guc *guc, u32 type) FIELD_PREP(GUC_HXG_REQUEST_MSG_0_ACTION, GUC_ACTION_HOST2GUC_DEREGISTER_CTB), FIELD_PREP(HOST2GUC_DEREGISTER_CTB_REQUEST_MSG_1_TYPE, type), }; + int ret; GEM_BUG_ON(type != GUC_CTB_TYPE_HOST2GUC && type != GUC_CTB_TYPE_GUC2HOST); /* CT deregistration must go over MMIO */ - return intel_guc_send_mmio(guc, request, ARRAY_SIZE(request), NULL, 0); + ret = intel_guc_send_mmio(guc, request, ARRAY_SIZE(request), NULL, 0); + + return ret > 0 ? -EPROTO : ret; } static int ct_deregister_buffer(struct intel_guc_ct *ct, u32 type) |