linux-kernel - RE: [PATCH] mach-davinci: signedness bug

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Date:	Tue, 16 Nov 2010 10:19:49 +0530
From:	"Nori, Sekhar" <nsekhar@...com>
To:	Nicolas Kaiser <nikai@...ai.net>,
	Kevin Hilman <khilman@...prootsystems.com>
CC:	"davinci-linux-open-source@...ux.davincidsp.com" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	"kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] mach-davinci: signedness bug

Hi Nicolas,

On Tue, Nov 16, 2010 at 00:10:28, Nicolas Kaiser wrote:
> aemif_calc_rate() can return a negative error value, so all the
> variables that get tested for this value need to be signed.
>
> The maximum bit width of WSETUP(WSETUP_MAX) appears to be 30 bits
> (0xf << 26). Using a signed instead of an unsigned integer
> shouldn't make a difference here.
>
> Signed-off-by: Nicolas Kaiser <nikai@...ai.net>

Thanks for the fix. You could use the subject:

"davinci: signedness bug in davinci_aemif_setup_timing()"

Other than that:

Acked-by: Sekhar Nori <nsekhar@...com>

Thanks,
Sekhar

> ---
>  arch/arm/mach-davinci/aemif.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-davinci/aemif.c b/arch/arm/mach-davinci/aemif.c
> index 9c3f500..1ce70a9 100644
> --- a/arch/arm/mach-davinci/aemif.c
> +++ b/arch/arm/mach-davinci/aemif.c
> @@ -90,7 +90,7 @@ int davinci_aemif_setup_timing(struct davinci_aemif_timing *t,
>                                       void __iomem *base, unsigned cs)
>  {
>       unsigned set, val;
> -     unsigned ta, rhold, rstrobe, rsetup, whold, wstrobe, wsetup;
> +     int ta, rhold, rstrobe, rsetup, whold, wstrobe, wsetup;
>       unsigned offset = A1CR_OFFSET + cs * 4;
>       struct clk *aemif_clk;
>       unsigned long clkrate;
> --
> 1.7.2.2
>

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