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[V2] ARM: mach-bcm: add ARM_ERRATA_775420

Message ID 1397841200-14061-1-git-send-email-sbranden@broadcom.com
State Accepted
Commit ffc1086a5512c9b6b3dacc2648cc8ba7fa530cb9
Headers show

Commit Message

Scott Branden April 18, 2014, 5:13 p.m. UTC 
ARM_ERRATA_775420 needs to be enabled.

A data cache maintenance operation which aborts, followed by an ISB,
without any DSB in-between, might lead to deadlock.

Affects: bug present in Cortex-A9 r3p0 and earlier. Fixed in r4p0.

Cortex-A9 r3p0 is used in a multitude of Broadcom parts including
the bcm21664, bcm281xx, 5301x families of devices.

Signed-off-by: Scott Branden <sbranden@broadcom.com>
Tested-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Acked-by: Matt Porter <mporter@linaro.org>
---
 arch/arm/mach-bcm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

Comments

Matt Porter April 25, 2014, 1:58 p.m. UTC | #1 
On Fri, Apr 18, 2014 at 10:13:20AM -0700, Scott Branden wrote:
> ARM_ERRATA_775420 needs to be enabled.
> 
> A data cache maintenance operation which aborts, followed by an ISB,
> without any DSB in-between, might lead to deadlock.
> 
> Affects: bug present in Cortex-A9 r3p0 and earlier. Fixed in r4p0.
> 
> Cortex-A9 r3p0 is used in a multitude of Broadcom parts including
> the bcm21664, bcm281xx, 5301x families of devices.

Applied to mach-bcm for-3.16/soc

Thanks,
Matt

> Signed-off-by: Scott Branden <sbranden@broadcom.com>
> Tested-by: Markus Mayer <markus.mayer@linaro.org>
> Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
> Reviewed-by: Alex Elder <elder@linaro.org>
> Acked-by: Matt Porter <mporter@linaro.org>
> ---
>  arch/arm/mach-bcm/Kconfig |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
> index 49c914c..9ef7f65 100644
> --- a/arch/arm/mach-bcm/Kconfig
> +++ b/arch/arm/mach-bcm/Kconfig
> @@ -15,6 +15,7 @@ config ARCH_BCM_MOBILE
>  	select ARCH_REQUIRE_GPIOLIB
>  	select ARM_ERRATA_754322
>  	select ARM_ERRATA_764369 if SMP
> +	select ARM_ERRATA_775420
>  	select ARM_GIC
>  	select GPIO_BCM_KONA
>  	select TICK_ONESHOT
> -- 
> 1.7.9.5
>
diff mbox

Patch

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 49c914c..9ef7f65 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -15,6 +15,7 @@  config ARCH_BCM_MOBILE
 	select ARCH_REQUIRE_GPIOLIB
 	select ARM_ERRATA_754322
 	select ARM_ERRATA_764369 if SMP
+	select ARM_ERRATA_775420
 	select ARM_GIC
 	select GPIO_BCM_KONA
 	select TICK_ONESHOT