[PATCH V2] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[PATCH V2] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[cgel.zte]

From: Minghao Chi <chi.minghao@zte.com.cn>

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq().

v1->v2:
	- Use more specific in the subject: ata: pata_pxa:
	- Switch to returning 'irq'
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
---
 drivers/ata/pata_pxa.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
index 41430f79663c..340b274d0cad 100644
--- a/drivers/ata/pata_pxa.c
+++ b/drivers/ata/pata_pxa.c
@@ -164,10 +164,10 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	struct resource *cmd_res;
 	struct resource *ctl_res;
 	struct resource *dma_res;
-	struct resource *irq_res;
 	struct pata_pxa_pdata *pdata = dev_get_platdata(&pdev->dev);
 	struct dma_slave_config	config;
 	int ret = 0;
+	int irq;
 
 	/*
 	 * Resource validation, three resources are needed:
@@ -205,9 +205,9 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	/*
 	 * IRQ pin
 	 */
-	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (unlikely(irq_res == NULL))
-		return -EINVAL;
+	irq = platform_get_irq(pdev, 0);
+	if (unlikely(irq < 0))
+		return irq;
 
 	/*
 	 * Allocate the host
@@ -287,7 +287,7 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	/*
 	 * Activate the ATA host
 	 */
-	ret = ata_host_activate(host, irq_res->start, ata_sff_interrupt,
+	ret = ata_host_activate(host, irq, ata_sff_interrupt,
 				pdata->irq_flags, &pxa_ata_sht);
 	if (ret)
 		dma_release_channel(data->dma_chan);
-- 
2.25.1

Re: [PATCH V2] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[Damien Le Moal]

On 3/9/22 14:50, cgel.zte@gmail.com wrote:
> From: Minghao Chi <chi.minghao@zte.com.cn>
> 
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
> 
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq().
> 
> v1->v2:
> 	- Use more specific in the subject: ata: pata_pxa:
> 	- Switch to returning 'irq'
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
> ---
>  drivers/ata/pata_pxa.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
> index 41430f79663c..340b274d0cad 100644
> --- a/drivers/ata/pata_pxa.c
> +++ b/drivers/ata/pata_pxa.c
> @@ -164,10 +164,10 @@ static int pxa_ata_probe(struct platform_device *pdev)
>  	struct resource *cmd_res;
>  	struct resource *ctl_res;
>  	struct resource *dma_res;
> -	struct resource *irq_res;
>  	struct pata_pxa_pdata *pdata = dev_get_platdata(&pdev->dev);
>  	struct dma_slave_config	config;
>  	int ret = 0;
> +	int irq;
>  
>  	/*
>  	 * Resource validation, three resources are needed:
> @@ -205,9 +205,9 @@ static int pxa_ata_probe(struct platform_device *pdev)
>  	/*
>  	 * IRQ pin
>  	 */
> -	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -	if (unlikely(irq_res == NULL))
> -		return -EINVAL;
> +	irq = platform_get_irq(pdev, 0);
> +	if (unlikely(irq < 0))

Please drop the unlikely() here. Not needed. This is not the hot path.

> +		return irq;
>  
>  	/*
>  	 * Allocate the host
> @@ -287,7 +287,7 @@ static int pxa_ata_probe(struct platform_device *pdev)
>  	/*
>  	 * Activate the ATA host
>  	 */
> -	ret = ata_host_activate(host, irq_res->start, ata_sff_interrupt,
> +	ret = ata_host_activate(host, irq, ata_sff_interrupt,
>  				pdata->irq_flags, &pxa_ata_sht);
>  	if (ret)
>  		dma_release_channel(data->dma_chan);


-- 
Damien Le Moal
Western Digital Research

[PATCH V3] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[cgel.zte]

From: Minghao Chi <chi.minghao@zte.com.cn>

platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.

In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq().

v1->v2:
    - Use more specific in the subject: ata: pata_pxa:
    - Switch to returning 'irq'
v2->v3:
    - drop the unlikely()

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
---
 drivers/ata/pata_pxa.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
index 41430f79663c..985f42c4fd70 100644
--- a/drivers/ata/pata_pxa.c
+++ b/drivers/ata/pata_pxa.c
@@ -164,10 +164,10 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	struct resource *cmd_res;
 	struct resource *ctl_res;
 	struct resource *dma_res;
-	struct resource *irq_res;
 	struct pata_pxa_pdata *pdata = dev_get_platdata(&pdev->dev);
 	struct dma_slave_config	config;
 	int ret = 0;
+	int irq;
 
 	/*
 	 * Resource validation, three resources are needed:
@@ -205,9 +205,9 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	/*
 	 * IRQ pin
 	 */
-	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (unlikely(irq_res == NULL))
-		return -EINVAL;
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
 
 	/*
 	 * Allocate the host
@@ -287,7 +287,7 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	/*
 	 * Activate the ATA host
 	 */
-	ret = ata_host_activate(host, irq_res->start, ata_sff_interrupt,
+	ret = ata_host_activate(host, irq, ata_sff_interrupt,
 				pdata->irq_flags, &pxa_ata_sht);
 	if (ret)
 		dma_release_channel(data->dma_chan);
-- 
2.25.1

Re: [PATCH V3] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[Damien Le Moal]

On 3/9/22 16:28, cgel.zte@gmail.com wrote:
> From: Minghao Chi <chi.minghao@zte.com.cn>
> 
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
> 
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq().
> 
> v1->v2:
>     - Use more specific in the subject: ata: pata_pxa:
>     - Switch to returning 'irq'
> v2->v3:
>     - drop the unlikely()

Looks good. FYI, the changelog above should be placed under the "---"
after your Signed-off-by so that it does not stay as part of the commit
message. No need to resend, I will remove this when applying.

Sergey,

Review OK ?

> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
> ---
>  drivers/ata/pata_pxa.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
> index 41430f79663c..985f42c4fd70 100644
> --- a/drivers/ata/pata_pxa.c
> +++ b/drivers/ata/pata_pxa.c
> @@ -164,10 +164,10 @@ static int pxa_ata_probe(struct platform_device *pdev)
>  	struct resource *cmd_res;
>  	struct resource *ctl_res;
>  	struct resource *dma_res;
> -	struct resource *irq_res;
>  	struct pata_pxa_pdata *pdata = dev_get_platdata(&pdev->dev);
>  	struct dma_slave_config	config;
>  	int ret = 0;
> +	int irq;
>  
>  	/*
>  	 * Resource validation, three resources are needed:
> @@ -205,9 +205,9 @@ static int pxa_ata_probe(struct platform_device *pdev)
>  	/*
>  	 * IRQ pin
>  	 */
> -	irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -	if (unlikely(irq_res == NULL))
> -		return -EINVAL;
> +	irq = platform_get_irq(pdev, 0);
> +	if (irq < 0)
> +		return irq;
>  
>  	/*
>  	 * Allocate the host
> @@ -287,7 +287,7 @@ static int pxa_ata_probe(struct platform_device *pdev)
>  	/*
>  	 * Activate the ATA host
>  	 */
> -	ret = ata_host_activate(host, irq_res->start, ata_sff_interrupt,
> +	ret = ata_host_activate(host, irq, ata_sff_interrupt,
>  				pdata->irq_flags, &pxa_ata_sht);
>  	if (ret)
>  		dma_release_channel(data->dma_chan);


-- 
Damien Le Moal
Western Digital Research

Re: [PATCH V3] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[Sergey Shtylyov]

On 09.03.2022 10:28, cgel.zte@gmail.com wrote:

> From: Minghao Chi <chi.minghao@zte.com.cn>
> 
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
> 
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq().
> 
> v1->v2:
>      - Use more specific in the subject: ata: pata_pxa:
>      - Switch to returning 'irq'
> v2->v3:
>      - drop the unlikely()
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>

Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>

[...]

MBR, Sergey

Re: [PATCH V3] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[Sergei Shtylyov]

On 09.03.2022 10:31, Damien Le Moal wrote:

>> From: Minghao Chi <chi.minghao@zte.com.cn>
>>
>> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
>> allocation of IRQ resources in DT core code, this causes an issue
>> when using hierarchical interrupt domains using "interrupts" property
>> in the node as this bypasses the hierarchical setup and messes up the
>> irq chaining.
>>
>> In preparation for removal of static setup of IRQ resource from DT core
>> code use platform_get_irq().
>>
>> v1->v2:
>>      - Use more specific in the subject: ata: pata_pxa:
>>      - Switch to returning 'irq'
>> v2->v3:
>>      - drop the unlikely()
> 
> Looks good. FYI, the changelog above should be placed under the "---"
> after your Signed-off-by so that it does not stay as part of the commit
> message. No need to resend, I will remove this when applying.
> 
> Sergey,
> 
> Review OK ?

    Yes.
    Although, strictly speaking, we still need to check for IRQ0 as well...

MBR, Sergey

Re: [PATCH V3] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[Sergey Shtylyov]

On 09.03.2022 11:55, Sergei Shtylyov wrote:

>>> From: Minghao Chi <chi.minghao@zte.com.cn>
>>>
>>> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
>>> allocation of IRQ resources in DT core code, this causes an issue
>>> when using hierarchical interrupt domains using "interrupts" property
>>> in the node as this bypasses the hierarchical setup and messes up the
>>> irq chaining.
>>>
>>> In preparation for removal of static setup of IRQ resource from DT core
>>> code use platform_get_irq().
>>>
>>> v1->v2:
>>>      - Use more specific in the subject: ata: pata_pxa:
>>>      - Switch to returning 'irq'
>>> v2->v3:
>>>      - drop the unlikely()
>>
>> Looks good. FYI, the changelog above should be placed under the "---"
>> after your Signed-off-by so that it does not stay as part of the commit
>> message. No need to resend, I will remove this when applying.
>>
>> Sergey,
>>
>> Review OK ?
> 
>     Yes.

    Ugh, replied from the wrong account. I had provided my Reviewed-by: tag 
already...

>     Although, strictly speaking, we still need to check for IRQ0 as well...

    The platform_get_irq() patch preventing IRQ0 hasn't landed still...

MBR, Sergey

Re: [PATCH V3] ata: pata_pxa: Use platform_get_irq() to get the interrupt

[Damien Le Moal]

On 3/9/22 16:28, cgel.zte@gmail.com wrote:
> From: Minghao Chi <chi.minghao@zte.com.cn>
> 
> platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
> allocation of IRQ resources in DT core code, this causes an issue
> when using hierarchical interrupt domains using "interrupts" property
> in the node as this bypasses the hierarchical setup and messes up the
> irq chaining.
> 
> In preparation for removal of static setup of IRQ resource from DT core
> code use platform_get_irq().
> 
> v1->v2:
>     - Use more specific in the subject: ata: pata_pxa:
>     - Switch to returning 'irq'
> v2->v3:
>     - drop the unlikely()
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>

Applied to for-5.18 (without commit message fix). Thanks !


-- 
Damien Le Moal
Western Digital Research