[PATCH 0/7] replace devm_request_and_ioremap by devm_ioremap_resource

[PATCH 0/7] replace devm_request_and_ioremap by devm_ioremap_resource

[Julia Lawall]

devm_request_and_ioremap has been replaced by devm_ioremap_resource, which
gives more informative error return code information.  This patch series
removes the remaining uses of devm_request_and_ioremap.

This patch series was generated using the semantic patch
scripts/coccinelle/api/devm_ioremap_resource.cocci from the Linux kernel
source tree.  Manual modifications have been made to move associated calls
to platform_get_resource closer to the resulting call to
devm_ioremap_resource and to remove the associated error handling code.

[PATCH 3/7] iommu/arm: replace devm_request_and_ioremap by devm_ioremap_resource

[Julia Lawall]

From: Julia Lawall <Julia.Lawall@lip6.fr>

Use devm_ioremap_resource instead of devm_request_and_ioremap.

This was partly done using the semantic patch
scripts/coccinelle/api/devm_ioremap_resource.cocci

The error-handling code on the call to platform_get_resource was removed
manually, and the initialization of smmu->size was manually moved lower, to
take advantage of the NULL test on res performed by devm_ioremap_resource.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/iommu/arm-smmu.c |   11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index ebd0a4c..dd91465 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1761,15 +1761,10 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
 	smmu->dev = dev;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "missing base address/size\n");
-		return -ENODEV;
-	}
-
+	smmu->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(smmu->base))
+		return PTR_ERR(smmu->base);
 	smmu->size = resource_size(res);
-	smmu->base = devm_request_and_ioremap(dev, res);
-	if (!smmu->base)
-		return -EADDRNOTAVAIL;
 
 	if (of_property_read_u32(dev->of_node, "#global-interrupts",
 				 &smmu->num_global_irqs)) {

[PATCH 3/7] iommu/arm: replace devm_request_and_ioremap by devm_ioremap_resource

[Will Deacon]

Hi Julia,

On Mon, Aug 19, 2013 at 12:20:37PM +0100, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> Use devm_ioremap_resource instead of devm_request_and_ioremap.
> 
> This was partly done using the semantic patch
> scripts/coccinelle/api/devm_ioremap_resource.cocci
> 
> The error-handling code on the call to platform_get_resource was removed
> manually, and the initialization of smmu->size was manually moved lower, to
> take advantage of the NULL test on res performed by devm_ioremap_resource.
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> ---
>  drivers/iommu/arm-smmu.c |   11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
> index ebd0a4c..dd91465 100644
> --- a/drivers/iommu/arm-smmu.c
> +++ b/drivers/iommu/arm-smmu.c
> @@ -1761,15 +1761,10 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
>  	smmu->dev = dev;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!res) {
> -		dev_err(dev, "missing base address/size\n");
> -		return -ENODEV;
> -	}
> -
> +	smmu->base = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(smmu->base))
> +		return PTR_ERR(smmu->base);
>  	smmu->size = resource_size(res);
> -	smmu->base = devm_request_and_ioremap(dev, res);
> -	if (!smmu->base)
> -		return -EADDRNOTAVAIL;

This does mean we trade arguably more useful error codes for the catch-all
-EINVAL, but the code ends up looking neater so I can be swayed either way.

Is this part of a series you're dealing with, or would you like me to take
this (I already sent my SMMU patches for 3.12)?

Cheers,

Will

[PATCH 3/7] iommu/arm: replace devm_request_and_ioremap by devm_ioremap_resource

[Julia Lawall]

On Tue, 20 Aug 2013, Will Deacon wrote:

> Hi Julia,
>
> On Mon, Aug 19, 2013 at 12:20:37PM +0100, Julia Lawall wrote:
> > From: Julia Lawall <Julia.Lawall@lip6.fr>
> >
> > Use devm_ioremap_resource instead of devm_request_and_ioremap.
> >
> > This was partly done using the semantic patch
> > scripts/coccinelle/api/devm_ioremap_resource.cocci
> >
> > The error-handling code on the call to platform_get_resource was removed
> > manually, and the initialization of smmu->size was manually moved lower, to
> > take advantage of the NULL test on res performed by devm_ioremap_resource.
> >
> > Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
> >
> > ---
> >  drivers/iommu/arm-smmu.c |   11 +++--------
> >  1 file changed, 3 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
> > index ebd0a4c..dd91465 100644
> > --- a/drivers/iommu/arm-smmu.c
> > +++ b/drivers/iommu/arm-smmu.c
> > @@ -1761,15 +1761,10 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
> >  	smmu->dev = dev;
> >
> >  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > -	if (!res) {
> > -		dev_err(dev, "missing base address/size\n");
> > -		return -ENODEV;
> > -	}
> > -
> > +	smmu->base = devm_ioremap_resource(dev, res);
> > +	if (IS_ERR(smmu->base))
> > +		return PTR_ERR(smmu->base);
> >  	smmu->size = resource_size(res);
> > -	smmu->base = devm_request_and_ioremap(dev, res);
> > -	if (!smmu->base)
> > -		return -EADDRNOTAVAIL;
>
> This does mean we trade arguably more useful error codes for the catch-all
> -EINVAL, but the code ends up looking neater so I can be swayed either way.
>
> Is this part of a series you're dealing with, or would you like me to take
> this (I already sent my SMMU patches for 3.12)?

Please take it onwards.  Thanks.

julia