From: Simon Horman <horms@verge.net.au>
To: linux-sh@vger.kernel.org
Subject: Re: [PATCH] ARM: mach-shmobile: sh7372 divide-by-zero FSIDIV fix
Date: Fri, 10 Jun 2011 02:23:31 +0000 [thread overview]
Message-ID: <20110610022325.GB643@verge.net.au> (raw)
In-Reply-To: <20110609064913.2219.62039.sendpatchset@t400s>
On Thu, Jun 09, 2011 at 03:49:13PM +0900, Magnus Damm wrote:
> From: Magnus Damm <damm@opensource.se>
>
> Update the sh7372 FSIDIV clock code to bail out
> with -EINVAL in case of rate is zero.
>
> Without this fix divide-by-zero is triggering
> on sh7372 platforms during system wide resume
> of Suspend-to-RAM.
Hi Magnus,
I'm unsure that I understand how rate ends up being
zero in the situation you describe.
>
> Signed-off-by: Magnus Damm <damm@opensource.se>
> ---
>
> arch/arm/mach-shmobile/clock-sh7372.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> --- 0001/arch/arm/mach-shmobile/clock-sh7372.c
> +++ work/arch/arm/mach-shmobile/clock-sh7372.c 2011-06-09 15:45:41.000000000 +0900
> @@ -460,6 +460,9 @@ static int fsidiv_set_rate(struct clk *c
> {
> int idx;
>
> + if (!rate)
> + return -EINVAL;
> +
> idx = (clk->parent->rate / rate) & 0xffff;
> if (idx < 2)
> return -EINVAL;
> --
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next prev parent reply other threads:[~2011-06-10 2:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-09 6:49 [PATCH] ARM: mach-shmobile: sh7372 divide-by-zero FSIDIV fix Magnus Damm
2011-06-10 2:23 ` Simon Horman [this message]
2011-06-10 4:54 ` Magnus Damm
2011-06-10 6:01 ` Simon Horman
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