[PATCH] ARM: LPAE: catch pending imprecise abort on unmask

[Russell King - ARM Linux]

On Tue, Jan 17, 2017 at 06:42:10PM +0100, Alexander Sverdlin wrote:
> Asynchronous external abort is coded differently in DFSR with LPAE enabled.
> 
> Fixes: 9254970c "ARM: 8447/1: catch pending imprecise abort on unmask".

Please drop it into the patch system, thanks.

> 
> Signed-off-by: Alexander Sverdlin <alexander.sverdlin at nokia.com>
> Cc: Russell King <linux at armlinux.org.uk>
> Cc: Andrew Morton <akpm at linux-foundation.org>
> Cc: linux-arm-kernel at lists.infradead.org
> ---
>  arch/arm/mm/fault.c | 4 ++--
>  arch/arm/mm/fault.h | 4 ++++
>  2 files changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
> index 3a2e678b8d30..0122ad1a6027 100644
> --- a/arch/arm/mm/fault.c
> +++ b/arch/arm/mm/fault.c
> @@ -610,9 +610,9 @@ static int __init early_abort_handler(unsigned long addr, unsigned int fsr,
>  
>  void __init early_abt_enable(void)
>  {
> -	fsr_info[22].fn = early_abort_handler;
> +	fsr_info[FSR_FS_AEA].fn = early_abort_handler;
>  	local_abt_enable();
> -	fsr_info[22].fn = do_bad;
> +	fsr_info[FSR_FS_AEA].fn = do_bad;
>  }
>  
>  #ifndef CONFIG_ARM_LPAE
> diff --git a/arch/arm/mm/fault.h b/arch/arm/mm/fault.h
> index 67532f242271..afc1f84e763b 100644
> --- a/arch/arm/mm/fault.h
> +++ b/arch/arm/mm/fault.h
> @@ -11,11 +11,15 @@
>  #define FSR_FS5_0		(0x3f)
>  
>  #ifdef CONFIG_ARM_LPAE
> +#define FSR_FS_AEA		17
> +
>  static inline int fsr_fs(unsigned int fsr)
>  {
>  	return fsr & FSR_FS5_0;
>  }
>  #else
> +#define FSR_FS_AEA		22
> +
>  static inline int fsr_fs(unsigned int fsr)
>  {
>  	return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
> -- 
> 2.11.0
> 

-- 
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