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iommu/arm-smmu: Handle unknown CERROR values gracefully 

Whilst the architecture only defines a few of the possible CERROR values,
we should handle unknown values gracefully rather than go out of bounds
trying to print out an error description.

Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2015-12-04 12:00:29 +00:00
parent 9a4a9d8c34
commit a0d5c04c60
1 changed files with 5 additions and 3 deletions
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8
drivers/iommu/arm-smmu-v3.c
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@ -857,15 +857,17 @@ static void arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu)
};
dev_err(smmu->dev, "CMDQ error (cons 0x%08x): %s\n", cons,
cerror_str[idx]);
idx < ARRAY_SIZE(cerror_str) ? cerror_str[idx] : "Unknown");
switch (idx) {
case CMDQ_ERR_CERROR_ILL_IDX:
break;
case CMDQ_ERR_CERROR_ABT_IDX:
dev_err(smmu->dev, "retrying command fetch\n");
case CMDQ_ERR_CERROR_NONE_IDX:
return;
case CMDQ_ERR_CERROR_ILL_IDX:
/* Fallthrough */
default:
break;
}
/*