linux-kernel - Re: [PATCH v1 1/1] gpio: 74xx-mmio: Use bits instead of plain numbers for flags

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Date:   Thu, 28 Jul 2022 15:48:17 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v1 1/1] gpio: 74xx-mmio: Use bits instead of plain numbers
 for flags

On Tue, Jul 26, 2022 at 11:14 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> The initial code was misleading to use bitwise AND against plain number,
> and the commit d3054ba1db62 ("gpio: 74xx-mmio: Check MMIO_74XX_DIR_IN flag
> in mmio_74xx_dir_in()") missed that. Switch definitions to be defined bits
> for the correct comparison.
>
> Fixes: d3054ba1db62 ("gpio: 74xx-mmio: Check MMIO_74XX_DIR_IN flag in mmio_74xx_dir_in()")
> Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>  drivers/gpio/gpio-74xx-mmio.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpio/gpio-74xx-mmio.c b/drivers/gpio/gpio-74xx-mmio.c
> index cd399898ed12..0464f1ecd20d 100644
> --- a/drivers/gpio/gpio-74xx-mmio.c
> +++ b/drivers/gpio/gpio-74xx-mmio.c
> @@ -13,8 +13,8 @@
>  #include <linux/platform_device.h>
>  #include <linux/property.h>
>
> -#define MMIO_74XX_DIR_IN       (0 << 8)
> -#define MMIO_74XX_DIR_OUT      (1 << 8)
> +#define MMIO_74XX_DIR_IN       BIT(8)
> +#define MMIO_74XX_DIR_OUT      BIT(9)
>  #define MMIO_74XX_BIT_CNT(x)   ((x) & GENMASK(7, 0))
>
>  struct mmio_74xx_gpio_priv {
> --
> 2.35.1
>

Applied, thanks!

Bart