linux-kernel - Re: [PATCH 1/2] bus: brcmstb_gisb: register the fault code hook

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Date:	Fri, 19 Sep 2014 12:45:45 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	linux-kernel@...r.kernel.org
CC:	arnd@...db.de, computersforpeace@...il.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] bus: brcmstb_gisb: register the fault code hook

On 09/19/2014 12:44 PM, Florian Fainelli wrote:
> Commit 44127b771d9c31 ("bus: add Broadcom GISB bus arbiter timeout/error
> handler") added everything that is required to register an ARM fault
> handler for imprecise external aborts, except that there is nothing
> calling this currently.
> 
> We do not need to export that specific function and have to update
> arch/arm/mach-bcm/brcmstb.c to call it, simply, register the fault
> handler with an arch_initcall.
> 
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> ---
>  drivers/bus/brcmstb_gisb.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/bus/brcmstb_gisb.c b/drivers/bus/brcmstb_gisb.c
> index f2cd6a2d40b4..daae4f77f34a 100644
> --- a/drivers/bus/brcmstb_gisb.c
> +++ b/drivers/bus/brcmstb_gisb.c
> @@ -48,6 +48,7 @@ struct brcmstb_gisb_arb_device {
>  	struct list_head next;
>  	u32 valid_mask;
>  	const char *master_names[sizeof(u32) * BITS_PER_BYTE];
> +	u32 saved_timeout;

Meh, this change is unrelated, I will resubmit a v2 shortly, sorry for
the noise.

>  };
>  
>  static LIST_HEAD(brcmstb_gisb_arb_device_list);
> @@ -160,11 +161,13 @@ static int brcmstb_bus_error_handler(unsigned long addr, unsigned int fsr,
>  	return ret;
>  }
>  
> -void __init brcmstb_hook_fault_code(void)
> +static int __init brcmstb_hook_fault_code(void)
>  {
>  	hook_fault_code(22, brcmstb_bus_error_handler, SIGBUS, 0,
>  			"imprecise external abort");
> +	return 0;
>  }
> +arch_initcall(brcmstb_hook_fault_code)
>  
>  static irqreturn_t brcmstb_gisb_timeout_handler(int irq, void *dev_id)
>  {
> 

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