[PATCH] iommu/arm-smmu-v3: Correct COHACC override message

[PATCH] iommu/arm-smmu-v3: Correct COHACC override message

[Robin Murphy]

Slightly confusingly, when reporting a mismatch of the ID register
value, we still refer to the IORT COHACC override flag as the
"dma-coherent property" if we booted with ACPI. Update the message
to be firmware-agnostic in line with SMMUv2.

Reported-by: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
 drivers/iommu/arm-smmu-v3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 47f52b1ab838..4c63b3cf4eba 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -2523,7 +2523,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 	 * register, but warn on mismatch.
 	 */
 	if (!!(reg & IDR0_COHACC) != coherent)
-		dev_warn(smmu->dev, "IDR0.COHACC overridden by dma-coherent property (%s)\n",
+		dev_warn(smmu->dev, "IDR0.COHACC overridden by FW configuration (%s)\n",
 			 coherent ? "true" : "false");
 
 	switch (reg & IDR0_STALL_MODEL_MASK << IDR0_STALL_MODEL_SHIFT) {
-- 
2.13.4.dirty

Re: [PATCH] iommu/arm-smmu-v3: Correct COHACC override message

[Lorenzo Pieralisi]

On Mon, Sep 25, 2017 at 02:55:40PM +0100, Robin Murphy wrote:
> Slightly confusingly, when reporting a mismatch of the ID register
> value, we still refer to the IORT COHACC override flag as the
> "dma-coherent property" if we booted with ACPI. Update the message
> to be firmware-agnostic in line with SMMUv2.
> 
> Reported-by: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
> Signed-off-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
> ---
>  drivers/iommu/arm-smmu-v3.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Apologies - missed while reshuffling the probe path to enable
ACPI probing:

Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>

> diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
> index 47f52b1ab838..4c63b3cf4eba 100644
> --- a/drivers/iommu/arm-smmu-v3.c
> +++ b/drivers/iommu/arm-smmu-v3.c
> @@ -2523,7 +2523,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
>  	 * register, but warn on mismatch.
>  	 */
>  	if (!!(reg & IDR0_COHACC) != coherent)
> -		dev_warn(smmu->dev, "IDR0.COHACC overridden by dma-coherent property (%s)\n",
> +		dev_warn(smmu->dev, "IDR0.COHACC overridden by FW configuration (%s)\n",
>  			 coherent ? "true" : "false");
>  
>  	switch (reg & IDR0_STALL_MODEL_MASK << IDR0_STALL_MODEL_SHIFT) {
> -- 
> 2.13.4.dirty
> 
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