On 4/20/2023 6:15 PM, john.c.harri...@intel.com wrote:
From: John Harrison <john.c.harri...@intel.com> It was noticed that duplicate entries in the firmware table could cause an infinite loop in the firmware loading code if that entry failed to load. Duplicate entries are a bug anyway and so should never happen. Ensure they don't by tweaking the table validation code to reject duplicates. For full m/m/p files, that can be done by simply tweaking the patch level check to reject matching values. For reduced version entries, the filename itself must be compared. Signed-off-by: John Harrison <john.c.harri...@intel.com> --- drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 27 +++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c index eb52e8db9ae0b..bc4011d55667c 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c @@ -319,7 +319,7 @@ static bool validate_fw_table_type(struct drm_i915_private *i915, enum intel_uc_ { const struct uc_fw_platform_requirement *fw_blobs; u32 fw_count; - int i; + int i, j;if (type >= ARRAY_SIZE(blobs_all)) {drm_err(&i915->drm, "No blob array for %s\n", intel_uc_fw_type_repr(type)); @@ -334,6 +334,27 @@ static bool validate_fw_table_type(struct drm_i915_private *i915, enum intel_uc_/* make sure the list is ordered as expected */for (i = 1; i < fw_count; i++) { + /* Versionless file names must be unique per platform: */ + for (j = i + 1; j < fw_count; j++) { + /* Same platform? */ + if (fw_blobs[i].p != fw_blobs[j].p) + continue; + + if (fw_blobs[i].blob.path != fw_blobs[j].blob.path) + continue; + + drm_err(&i915->drm, "Diplicaate %s blobs: %s r%u %s%d.%d.%d [%s] matches %s r%u %s%d.%d.%d [%s]\n",
typo Diplicaate
+ intel_uc_fw_type_repr(type), + intel_platform_name(fw_blobs[j].p), fw_blobs[j].rev, + fw_blobs[j].blob.legacy ? "L" : "v", + fw_blobs[j].blob.major, fw_blobs[j].blob.minor, + fw_blobs[j].blob.patch, fw_blobs[j].blob.path, + intel_platform_name(fw_blobs[i].p), fw_blobs[i].rev,
nit: we could avoid printing the platform twice because you're explicitly checking that it is the same earlier on. Not a blocked.
With the typo fixed: Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com> Daniele
+ fw_blobs[i].blob.legacy ? "L" : "v", + fw_blobs[i].blob.major, fw_blobs[i].blob.minor, + fw_blobs[i].blob.patch, fw_blobs[i].blob.path); + } + /* Next platform is good: */ if (fw_blobs[i].p < fw_blobs[i - 1].p) continue; @@ -377,8 +398,8 @@ static bool validate_fw_table_type(struct drm_i915_private *i915, enum intel_uc_ if (fw_blobs[i].blob.minor != fw_blobs[i - 1].blob.minor) goto bad;- /* Patch versions must be in order: */- if (fw_blobs[i].blob.patch <= fw_blobs[i - 1].blob.patch) + /* Patch versions must be in order and unique: */ + if (fw_blobs[i].blob.patch < fw_blobs[i - 1].blob.patch) continue;bad:
