linux-kernel - Re: [PATCH 3.9-stable] ARM: EXYNOS5: Fix kernel dump in AFTR idle mode

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Date:	Fri, 17 May 2013 14:05:06 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	jonghwan Choi <jhbird.choi@...il.com>
Cc:	Jonghwan Choi <jhbird.choi@...sung.com>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Inderpal Singh <inderpal.singh@...aro.org>,
	Chander Kashyap <chander.kashyap@...aro.org>
Subject: Re: [PATCH 3.9-stable] ARM: EXYNOS5: Fix kernel dump in AFTR idle
 mode

On Fri, May 17, 2013 at 09:59:10PM +0900, jonghwan Choi wrote:
> > Would you agree that this could also be applied to the 3.5 kernel as well?
> 
> I believe this is applicable to the 3.5.x kernel tree.
> 
> Thanks.

Great, thanks.  I'll queue it for 3.5 kernel.

Cheers,
--
Luis

>
> 
> On Fri, May 17, 2013 at 7:37 PM, Luis Henriques <
> luis.henriques@...onical.com> wrote:
> 
> > On Fri, May 10, 2013 at 09:28:36AM +0900, Jonghwan Choi wrote:
> > > This patch looks like it should be in the 3.9-stable tree, should we
> > apply
> > > it?
> >
> > Would you agree that this could also be applied to the 3.5 kernel as well?
> >
> > Cheers,
> > --
> > Luis
> >
> >
> > >
> > > ------------------
> > >
> > > From: "Inderpal Singh <inderpal.singh@...aro.org>"
> > >
> > > commit 088584618836b159947bc4ab5011a5cf1f081a62 upstream
> > >
> > > The kernel crashes while resuming from AFTR idle mode. It happens
> > > because L2 cache was not going into retention state.
> > >
> > > This patch configures the USE_RETENTION bit of ARM_L2_OPTION register
> > > so that it does not depend on MANUAL_L2RSTDISABLE_CONTROL of
> > > ARM_COMMON_OPTION register for L2RSTDISABLE signal.
> > >
> > > Signed-off-by: Inderpal Singh <inderpal.singh@...aro.org>
> > > Tested-by: Chander Kashyap <chander.kashyap@...aro.org>
> > > Signed-off-by: Olof Johansson <olof@...om.net>
> > > Signed-off-by: Jonghwan Choi <jhbird.choi@...sung.com>
> > > ---
> > >  arch/arm/mach-exynos/include/mach/regs-pmu.h |    1 +
> > >  arch/arm/mach-exynos/pmu.c                   |    5 ++---
> > >  2 files changed, 3 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/arch/arm/mach-exynos/include/mach/regs-pmu.h
> > > b/arch/arm/mach-exynos/include/mach/regs-pmu.h
> > > index 3f30aa1..57344b7 100644
> > > --- a/arch/arm/mach-exynos/include/mach/regs-pmu.h
> > > +++ b/arch/arm/mach-exynos/include/mach/regs-pmu.h
> > > @@ -344,6 +344,7 @@
> > >  #define EXYNOS5_FSYS_ARM_OPTION
> > > S5P_PMUREG(0x2208)
> > >  #define EXYNOS5_ISP_ARM_OPTION
> > > S5P_PMUREG(0x2288)
> > >  #define EXYNOS5_ARM_COMMON_OPTION
> > > S5P_PMUREG(0x2408)
> > > +#define EXYNOS5_ARM_L2_OPTION
> > > S5P_PMUREG(0x2608)
> > >  #define EXYNOS5_TOP_PWR_OPTION
> > > S5P_PMUREG(0x2C48)
> > >  #define EXYNOS5_TOP_PWR_SYSMEM_OPTION
> > > S5P_PMUREG(0x2CC8)
> > >  #define EXYNOS5_JPEG_MEM_OPTION
> > > S5P_PMUREG(0x2F48)
> > > diff --git a/arch/arm/mach-exynos/pmu.c b/arch/arm/mach-exynos/pmu.c
> > > index daebc1a..97d6885 100644
> > > --- a/arch/arm/mach-exynos/pmu.c
> > > +++ b/arch/arm/mach-exynos/pmu.c
> > > @@ -228,6 +228,7 @@ static struct exynos_pmu_conf
> > exynos5250_pmu_config[] =
> > > {
> > >       { EXYNOS5_DIS_IRQ_ISP_ARM_CENTRAL_SYS_PWR_REG,  { 0x0, 0x0, 0x0} },
> > >       { EXYNOS5_ARM_COMMON_SYS_PWR_REG,               { 0x0, 0x0, 0x2} },
> > >       { EXYNOS5_ARM_L2_SYS_PWR_REG,                   { 0x3, 0x3, 0x3} },
> > > +     { EXYNOS5_ARM_L2_OPTION,                        { 0x10, 0x10, 0x0 }
> > > },
> > >       { EXYNOS5_CMU_ACLKSTOP_SYS_PWR_REG,             { 0x1, 0x0, 0x1} },
> > >       { EXYNOS5_CMU_SCLKSTOP_SYS_PWR_REG,             { 0x1, 0x0, 0x1} },
> > >       { EXYNOS5_CMU_RESET_SYS_PWR_REG,                { 0x1, 0x1, 0x0} },
> > > @@ -353,11 +354,9 @@ static void exynos5_init_pmu(void)
> > >
> > >       /*
> > >        * SKIP_DEACTIVATE_ACEACP_IN_PWDN_BITFIELD Enable
> > > -      * MANUAL_L2RSTDISABLE_CONTROL_BITFIELD Enable
> > >        */
> > >       tmp = __raw_readl(EXYNOS5_ARM_COMMON_OPTION);
> > > -     tmp |= (EXYNOS5_MANUAL_L2RSTDISABLE_CONTROL |
> > > -             EXYNOS5_SKIP_DEACTIVATE_ACEACP_IN_PWDN);
> > > +     tmp |= EXYNOS5_SKIP_DEACTIVATE_ACEACP_IN_PWDN;
> > >       __raw_writel(tmp, EXYNOS5_ARM_COMMON_OPTION);
> > >
> > >       /*
> > > --
> > > 1.7.9.5
> > >
> > > --
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