Re: [PATCH] ata: sata_dwc_460ex: use platform_get_irq()

[Damien Le Moal <dlemoal@kernel.org>]

On 6/30/26 16:41, Niklas Cassel wrote:
> On Sun, Jun 28, 2026 at 04:03:10PM -0700, Rosen Penev wrote:
>> Replace irq_of_parse_and_map() with platform_get_irq() in both
>> sata_dwc_dma_init_old() and sata_dwc_probe(). This is the preferred
>> way to obtain IRQs for platform devices and provides better error
>> reporting.  Remove the now-unnecessary #include <linux/of_irq.h>.
>>
>> irq_of_parse_and_map() requires irq_dispose_mapping(), which is missing.
>>
>> Assisted-by: opencode:big-pickle
>> Signed-off-by: Rosen Penev <rosenp@gmail.com>
>> ---
>>  drivers/ata/sata_dwc_460ex.c | 18 ++++++------------
>>  1 file changed, 6 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
>> index 4fc22ce4bd9a..35aa7f9acdf7 100644
>> --- a/drivers/ata/sata_dwc_460ex.c
>> +++ b/drivers/ata/sata_dwc_460ex.c
>> @@ -19,7 +19,6 @@
>>  #include <linux/device.h>
>>  #include <linux/dmaengine.h>
>>  #include <linux/of.h>
>> -#include <linux/of_irq.h>
>>  #include <linux/platform_device.h>
>>  #include <linux/phy/phy.h>
>>  #include <linux/libata.h>
>> @@ -226,7 +225,6 @@ static int sata_dwc_dma_init_old(struct platform_device *pdev,
>>  				 struct sata_dwc_device *hsdev)
>>  {
>>  	struct device *dev = &pdev->dev;
>> -	struct device_node *np = dev->of_node;
> 
> While this patch drops 'struct device_node *np = dev->of_node;' from
> sata_dwc_dma_init_old() ...
> 
>>  
>>  	hsdev->dma = devm_kzalloc(dev, sizeof(*hsdev->dma), GFP_KERNEL);
>>  	if (!hsdev->dma)
>> @@ -236,11 +234,9 @@ static int sata_dwc_dma_init_old(struct platform_device *pdev,
>>  	hsdev->dma->id = pdev->id;
>>  
>>  	/* Get SATA DMA interrupt number */
>> -	hsdev->dma->irq = irq_of_parse_and_map(np, 1);
>> -	if (!hsdev->dma->irq) {
>> -		dev_err(dev, "no SATA DMA irq\n");
>> -		return -ENODEV;
>> -	}
>> +	hsdev->dma->irq = platform_get_irq(pdev, 1);
>> +	if (hsdev->dma->irq < 0)
>> +		return hsdev->dma->irq;
>>  
>>  	/* Get physical SATA DMA register base address */
>>  	hsdev->dma->regs = devm_platform_ioremap_resource(pdev, 1);
>> @@ -1173,11 +1169,9 @@ static int sata_dwc_probe(struct platform_device *ofdev)
> 
> it seems like you forgot to do the same for sata_dwc_probe().
> 
> Which results in a new warning:
> https://lore.kernel.org/oe-kbuild-all/202606301243.9MrXM4WY-lkp@intel.com/T/#u
> 
> Damien, perhaps drop this patch and wait for a v2,
> or fixup the patch to remove 'struct device_node *np = dev->of_node;'
> also from sata_dwc_probe().
> 
> 
>>  	sata_dwc_enable_interrupts(hsdev);
>>  
>>  	/* Get SATA interrupt number */
>> -	irq = irq_of_parse_and_map(np, 0);
>> -	if (!irq) {
>> -		dev_err(dev, "no SATA DMA irq\n");
>> -		return -ENODEV;
>> -	}
>> +	irq = platform_get_irq(ofdev, 0);
>> +	if (irq < 0)
>> +		return irq;
>>  
>>  #ifdef CONFIG_SATA_DWC_OLD_DMA
>>  	if (!of_property_present(np, "dmas")) {

Hmmm... np is used here though...

I will drop the patch for now and wait for a v2.

>> -- 
>> 2.54.0
>>


-- 
Damien Le Moal
Western Digital Research