linux-kernel - Re: [PATCH] ARM: OMAP2+: timer: initialize before using oh

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Message-ID: <51A51FAC.5090606@gmail.com>
Date:	Tue, 28 May 2013 22:20:44 +0100
From:	Jon Hunter <jgchunter@...il.com>
To:	Afzal Mohammed <afzal@...com>
CC:	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH] ARM: OMAP2+: timer: initialize before using oh_name


On 28/05/13 07:24, Afzal Mohammed wrote:
> of_property_read_string_index(...,&oh_name) in omap_dm_timer_init_one
> does not alter the value of 'oh_name' even if the relevant function
> fails and as 'oh_name' in stack may have a non-zero value, it would
> be misunderstood by timer code that DT has specified "ti,hwmod"
> property for timer. 'oh_name' in this scenario would be a junk value,
> this would result in module not being enabled by hwmod API's for
> timer, and in turn crash.
> 
> Signed-off-by: Afzal Mohammed <afzal@...com>
> ---
>  arch/arm/mach-omap2/timer.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
> index f8b23b8..8e0c390 100644
> --- a/arch/arm/mach-omap2/timer.c
> +++ b/arch/arm/mach-omap2/timer.c
> @@ -220,7 +220,7 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
>  					 int posted)
>  {
>  	char name[10]; /* 10 = sizeof("gptXX_Xck0") */
> -	const char *oh_name;
> +	const char *oh_name = NULL;
>  	struct device_node *np;
>  	struct omap_hwmod *oh;
>  	struct resource irq, mem;

Thanks!

Acked-by: Jon Hunter <jgchunter@...il.com>

Cheers
Jon

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