linux-kernel - Re: [PATCH V2] mtd: nand: pasemi: switch to pr

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Date:	Sat, 9 Apr 2016 12:50:35 +0300
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Rafał Miłecki <zajec5@...il.com>
Cc:	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Richard Weinberger <richard@....at>,
	"open list:MEMORY TECHNOLOGY..." <linux-mtd@...ts.infradead.org>,
	Egor Martovetsky <egor@...emi.com>,
	Olof Johansson <olof@...om.net>, Joe Perches <joe@...ches.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	"open list:LINUX FOR POWERPC PA SEMI PWRFICIENT" 
	<linuxppc-dev@...ts.ozlabs.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2] mtd: nand: pasemi: switch to pr_* functions

On Fri, Apr 8, 2016 at 2:13 PM, Rafał Miłecki <zajec5@...il.com> wrote:
> 1) Use pr_fmt to keep messages consistent
> 2) Don't warn if kzalloc fails as it dumps stack on its own
> 3) Use %pR format for displaying whole resource to avoid:
> warning: format ‘%08llx’ expects type ‘long long unsigned int’, but argument 2 has type ‘resource_size_t’
>
> Signed-off-by: Rafał Miłecki <zajec5@...il.com>
> ---
>  drivers/mtd/nand/pasemi_nand.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mtd/nand/pasemi_nand.c b/drivers/mtd/nand/pasemi_nand.c
> index 63fcb8c..e8372b4 100644
> --- a/drivers/mtd/nand/pasemi_nand.c
> +++ b/drivers/mtd/nand/pasemi_nand.c
> @@ -22,6 +22,8 @@
>
>  #undef DEBUG
>
> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> +
>  #include <linux/slab.h>
>  #include <linux/module.h>
>  #include <linux/mtd/mtd.h>
> @@ -112,8 +114,6 @@ static int pasemi_nand_probe(struct platform_device *ofdev)
>         /* Allocate memory for MTD device structure and private data */
>         chip = kzalloc(sizeof(struct nand_chip), GFP_KERNEL);
>         if (!chip) {
> -               printk(KERN_WARNING
> -                      "Unable to allocate PASEMI NAND MTD device structure\n");
>                 err = -ENOMEM;
>                 goto out;
>         }
> @@ -163,13 +163,12 @@ static int pasemi_nand_probe(struct platform_device *ofdev)
>         }
>
>         if (mtd_device_register(pasemi_nand_mtd, NULL, 0)) {
> -               printk(KERN_ERR "pasemi_nand: Unable to register MTD device\n");
> +               pr_err("Unable to register MTD device\n");

And why not to use dev_err(&ofdev->dev, …); ?

>                 err = -ENODEV;
>                 goto out_lpc;
>         }
>
> -       printk(KERN_INFO "PA Semi NAND flash at %08llx, control at I/O %x\n",
> -              res.start, lpcctl);
> +       pr_info("PA Semi NAND flash at %pR, control at I/O %x\n", &res, lpcctl);
>

Ditto.

>         return 0;
>
> --
> 1.8.4.5
>



-- 
With Best Regards,
Andy Shevchenko