linux-kernel - Re: [PATCH] arch: sparc: kernel: use devm_ioremap

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Date:	Mon, 13 May 2013 13:43:17 +0200
From:	Laurent Navet <laurent.navet@...il.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	davem@...emloft.net, daniel@...sler.com,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch: sparc: kernel: use devm_ioremap_resource()

The same is done almost everywhere in kernel tree :

e.g :
http://lxr.free-electrons.com/source/drivers/staging/iio/adc/mxs-lradc.c#L928
http://lxr.free-electrons.com/source/drivers/gpio/gpio-mxs.c#L292
http://lxr.free-electrons.com/source/drivers/iommu/tegra-smmu.c#L1181
http://lxr.free-electrons.com/source/drivers/rtc/rtc-spear.c#L388
http://lxr.free-electrons.com/source/drivers/i2c/busses/i2c-imx.c#L514
http://lxr.free-electrons.com/source/sound/soc/kirkwood/kirkwood-i2s.c#L475

and so on...  all theses functions return an int.

Regards,
Laurent.

2013/5/12, Sam Ravnborg <sam@...nborg.org>:
> On Sun, May 12, 2013 at 04:10:07PM +0200, Laurent Navet wrote:
>> Replace a call to deprecated devm_request_and_ioremap by
>> devm_ioremap_resource.
>>
>> Found with coccicheck and this semantic patch:
>>  scripts/coccinelle/api/devm_request_and_ioremap.cocci.
>>
>> Signed-off-by: Laurent Navet <laurent.navet@...il.com>
>> ---
>>  arch/sparc/kernel/leon_pci_grpci1.c |    8 +++-----
>>  1 file changed, 3 insertions(+), 5 deletions(-)
>>
>> diff --git a/arch/sparc/kernel/leon_pci_grpci1.c
>> b/arch/sparc/kernel/leon_pci_grpci1.c
>> index 7739a54..6df26e3 100644
>> --- a/arch/sparc/kernel/leon_pci_grpci1.c
>> +++ b/arch/sparc/kernel/leon_pci_grpci1.c
>> @@ -536,11 +536,9 @@ static int grpci1_of_probe(struct platform_device
>> *ofdev)
>>
>>  	/* find device register base address */
>>  	res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
>> -	regs = devm_request_and_ioremap(&ofdev->dev, res);
>> -	if (!regs) {
>> -		dev_err(&ofdev->dev, "io-regs mapping failed\n");
>> -		return -EADDRNOTAVAIL;
>> -	}
>> +	regs = devm_ioremap_resource(&ofdev->dev, res);
>> +	if (IS_ERR(regs))
>> +		return PTR_ERR(regs);
>
> This looks bogus. The function return an int - not a pointer.
>
> 	Sam
>


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