[PATCH 5/9] powerpc/85xx: disable irq by hardware when suspend for 64-bit
From: Chenhui Zhao <hidden>
Date: 2014-03-07 05:00:28
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), linux for powerpc embedded ppc85xx, the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Scott Wood, Linus Torvalds
In 64-bit mode, kernel just clears the irq soft-enable flag in struct paca_struct to disable external irqs. But, in the case of suspend, irqs should be disabled by hardware. Therefore, hook a function to ppc_md.suspend_disable_irqs to really disable irqs. Signed-off-by: Chenhui Zhao <redacted> --- arch/powerpc/platforms/85xx/corenet_generic.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/85xx/corenet_generic.c b/arch/powerpc/platforms/85xx/corenet_generic.c
index 3fdf9f3..983d81f 100644
--- a/arch/powerpc/platforms/85xx/corenet_generic.c
+++ b/arch/powerpc/platforms/85xx/corenet_generic.c@@ -32,6 +32,13 @@ #include <sysdev/fsl_pci.h> #include "smp.h" +#if defined(CONFIG_PPC64) && defined(CONFIG_SUSPEND) +static void fsl_suspend_disable_irqs(void) +{ + __hard_irq_disable(); +} +#endif + void __init corenet_gen_pic_init(void) { struct mpic *mpic;
@@ -58,6 +65,11 @@ void __init corenet_gen_setup_arch(void) fsl_rcpm_init(); +#if defined(CONFIG_PPC64) && defined(CONFIG_SUSPEND) + /* physically disable irq for 64-bit mode when suspend */ + ppc_md.suspend_disable_irqs = fsl_suspend_disable_irqs; +#endif + pr_info("%s board from Freescale Semiconductor\n", ppc_md.name); }
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1.7.3