linux-kernel - Re: [PATCH 1/2] pinctrl: free allocated pinctrl_map structure only once and use kernel facilities for IMX_PMX

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CACRpkdYCUOwNVApn06x+_1CA0zNarUt6d-4Kfd76P=UeREDrRw@mail.gmail.com>
Date:	Thu, 7 Jun 2012 13:03:13 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Devendra Naga <devendra.aaru@...il.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	Dong Aisheng <dong.aisheng@...aro.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] pinctrl: free allocated pinctrl_map structure only
 once and use kernel facilities for IMX_PMX_DUMP

On Sat, Jun 2, 2012 at 7:03 PM, Devendra Naga <devendra.aaru@...il.com> wrote:

> a) as we allocate the pinctrl_map structure at imx_dt_node_to_map at  line 167, anyway
> if its an element, or a num_elements * (sizeof(type)) elements allocated to one single
> pointer must be freed only once.
>
> CASE. A)
>
> as new_map is not moved and allocated like,
>
> for (i = 0; i < MAX_ELEMS; i++) {
>        new_map[i] = kmalloc(numelems * size, GFP_KERNEL);
> }
>
> its freed as
>
> for (i = 0; i < MAX_ELEMS; i++) {
>        kfree(new_map[i]);
> }
>
> CASE. B)
> and its allocated like
>        new_map = kmalloc(numelems * size, GFP_KERNEL);
>
> it just needs kfree not as case A's.
>
> b) use KERN_DEBUG facility for the IMX_PMX_DUMP macro.
>
> Signed-off-by: Devendra Naga <devendra.aaru@...il.com>
> ---
>  drivers/pinctrl/pinctrl-imx.c |   23 +++++++++++------------
>  1 file changed, 11 insertions(+), 12 deletions(-)

Shawn/Dong: can you look at this patch too?

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/