From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Kent Gibson <warthog618@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: Re: [PATCH v2 06/11] gpiolib: use gpiochip_get_desc() in gpio_ioctl()
Date: Thu, 5 Dec 2019 00:21:17 +0200 [thread overview]
Message-ID: <CAHp75Ve00HXD6Zm6Ypy4oapAZTJk99tzDSu-=c5NG4iOjK8KzQ@mail.gmail.com> (raw)
In-Reply-To: <20191204155912.17590-7-brgl@bgdev.pl>
On Wed, Dec 4, 2019 at 6:04 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
>
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Unduplicate the offset check by simply calling gpiochip_get_desc() and
> checking its return value.
>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> ---
> drivers/gpio/gpiolib.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index 17796437d7be..b7043946c029 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -1175,10 +1175,11 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
>
> if (copy_from_user(&lineinfo, ip, sizeof(lineinfo)))
> return -EFAULT;
> - if (lineinfo.line_offset >= gdev->ngpio)
> - return -EINVAL;
>
> - desc = &gdev->descs[lineinfo.line_offset];
> + desc = gpiochip_get_desc(chip, lineinfo.line_offset);
> + if (IS_ERR(desc))
> + return PTR_ERR(desc);
> +
> if (desc->name) {
> strncpy(lineinfo.name, desc->name,
> sizeof(lineinfo.name));
> --
> 2.23.0
>
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2019-12-04 22:21 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-04 15:59 [PATCH v2 00/11] gpiolib: add an ioctl() for monitoring line status changes Bartosz Golaszewski
2019-12-04 15:59 ` [PATCH v2 01/11] gpiolib: use 'unsigned int' instead of 'unsigned' in gpio_set_config() Bartosz Golaszewski
2019-12-04 22:18 ` Andy Shevchenko
2019-12-04 15:59 ` [PATCH v2 02/11] gpiolib: have a single place of calling set_config() Bartosz Golaszewski
2019-12-04 22:18 ` Andy Shevchenko
2019-12-04 15:59 ` [PATCH v2 03/11] gpiolib: convert the type of hwnum to unsigned int in gpiochip_get_desc() Bartosz Golaszewski
2019-12-04 22:19 ` Andy Shevchenko
2019-12-04 15:59 ` [PATCH v2 04/11] gpiolib: use gpiochip_get_desc() in linehandle_create() Bartosz Golaszewski
2019-12-04 22:20 ` Andy Shevchenko
2019-12-04 15:59 ` [PATCH v2 05/11] gpiolib: use gpiochip_get_desc() in lineevent_create() Bartosz Golaszewski
2019-12-04 22:20 ` Andy Shevchenko
2019-12-04 15:59 ` [PATCH v2 06/11] gpiolib: use gpiochip_get_desc() in gpio_ioctl() Bartosz Golaszewski
2019-12-04 16:25 ` Rainer Sickinger
2019-12-04 22:21 ` Andy Shevchenko [this message]
2019-12-04 15:59 ` [PATCH v2 07/11] gpiolib: rework the locking mechanism for lineevent kfifo Bartosz Golaszewski
2019-12-04 22:25 ` Andy Shevchenko
2019-12-05 9:31 ` Bartosz Golaszewski
2019-12-05 10:22 ` Andy Shevchenko
2019-12-04 15:59 ` [PATCH v2 08/11] gpiolib: emit a debug message when adding events to a full kfifo Bartosz Golaszewski
2019-12-04 22:28 ` Andy Shevchenko
2019-12-19 16:22 ` Bartosz Golaszewski
2019-12-04 15:59 ` [PATCH v2 09/11] gpiolib: provide a dedicated function for setting lineinfo Bartosz Golaszewski
2019-12-04 22:30 ` Andy Shevchenko
2019-12-05 9:28 ` Bartosz Golaszewski
2019-12-05 10:20 ` Andy Shevchenko
2019-12-05 13:45 ` Bartosz Golaszewski
2019-12-05 16:47 ` Andy Shevchenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAHp75Ve00HXD6Zm6Ypy4oapAZTJk99tzDSu-=c5NG4iOjK8KzQ@mail.gmail.com' \
--to=andy.shevchenko@gmail.com \
--cc=bgolaszewski@baylibre.com \
--cc=brgl@bgdev.pl \
--cc=linus.walleij@linaro.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=warthog618@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).