linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Alexey Dobriyan <adobriyan@gmail.com>
To: gregkh@linuxfoundation.org, rafael@kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] driver core: cleanup kstrto*() usage
Date: Sun, 22 Nov 2020 15:10:18 +0300	[thread overview]
Message-ID: <20201122121018.GA48617@localhost.localdomain> (raw)

kstrto*() functions can write result directly to target memory
if no additional checks needs to be done.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

 drivers/base/core.c |   12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1701,12 +1701,10 @@ ssize_t device_store_ulong(struct device *dev,
 {
 	struct dev_ext_attribute *ea = to_ext_attr(attr);
 	int ret;
-	unsigned long new;
 
-	ret = kstrtoul(buf, 0, &new);
+	ret = kstrtoul(buf, 0, (unsigned long *)ea->var);
 	if (ret)
 		return ret;
-	*(unsigned long *)(ea->var) = new;
 	/* Always return full write size even if we didn't consume all */
 	return size;
 }
@@ -1726,16 +1724,12 @@ ssize_t device_store_int(struct device *dev,
 			 const char *buf, size_t size)
 {
 	struct dev_ext_attribute *ea = to_ext_attr(attr);
+	int val;
 	int ret;
-	long new;
 
-	ret = kstrtol(buf, 0, &new);
+	ret = kstrtoint(buf, 0, (int *)ea->var);
 	if (ret)
 		return ret;
-
-	if (new > INT_MAX || new < INT_MIN)
-		return -EINVAL;
-	*(int *)(ea->var) = new;
 	/* Always return full write size even if we didn't consume all */
 	return size;
 }

             reply	other threads:[~2020-11-22 12:10 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-22 12:10 Alexey Dobriyan [this message]
2020-11-23  0:31 ` kernel test robot

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=20201122121018.GA48617@localhost.localdomain \
    --to=adobriyan@gmail.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=rafael@kernel.org \
    --subject='Re: [PATCH] driver core: cleanup kstrto*() usage' \
    /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

This is a public inbox, see mirroring instructions
on how to clone and mirror all data and code used for this inbox