From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Linus Walleij <linus.walleij@linaro.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Subject: Re: [PATCH 2/3] gpiolib: use a more explicit retval logic in gpiochip_get_direction()
Date: Tue, 25 Feb 2025 15:19:22 +0200 [thread overview]
Message-ID: <Z73DWoscARsC06gS@smile.fi.intel.com> (raw)
In-Reply-To: <20250225-retval-fixes-v1-2-078c4c98517a@linaro.org>
On Tue, Feb 25, 2025 at 12:56:24PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> We have existing macros for direction settings so we don't need to rely
> on the magic value of 1 in the retval check. Use readable logic that
> explicitly says we expect INPUT, OUTPUT or a negative errno and nothing
> else in gpiochip_get_direction().
...
> ret = gc->get_direction(gc, offset);
> - if (ret > 1)
> + if (!(ret == GPIO_LINE_DIRECTION_OUT ||
> + ret == GPIO_LINE_DIRECTION_IN || ret < 0))
> ret = -EBADE;
Wouldn't be better to write it as
if (ret < 0)
return ret;
if (ret != GPIO_LINE_DIRECTION_OUT && ret != GPIO_LINE_DIRECTION_IN)
ret = -EBADE;
return ret;
Otherwise LGTM,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
after addressing the above.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2025-02-25 13:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-25 11:56 [PATCH 0/3] gpiolib: fix bugs in retval sanitization Bartosz Golaszewski
2025-02-25 11:56 ` [PATCH 1/3] gpiolib: don't use gpiochip_get_direction() when registering a chip Bartosz Golaszewski
2025-02-25 13:22 ` Marek Szyprowski
2025-02-25 13:22 ` Andy Shevchenko
2025-02-25 14:43 ` Bartosz Golaszewski
2025-02-25 14:46 ` Andy Shevchenko
2025-02-25 11:56 ` [PATCH 2/3] gpiolib: use a more explicit retval logic in gpiochip_get_direction() Bartosz Golaszewski
2025-02-25 13:19 ` Andy Shevchenko [this message]
2025-02-25 11:56 ` [PATCH 3/3] gpiolib: don't double-check the gc->get callback's existence Bartosz Golaszewski
2025-02-25 13:20 ` Andy Shevchenko
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