This patch makes pseries_idle_driver not to be registered when
power_save=off kernel boot option is specified. The
boot_option_idle_override variable used here is similar to
its usage on x86.
Signed-off-by: Deepthi Dharwar <deepthi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Trinabh Gupta <g.trinabh@xxxxxxxxx>
Signed-off-by: Arun R Bharadwaj <arun.r.bharadwaj@xxxxxxxxx>
---
arch/powerpc/include/asm/processor.h | 1 +
arch/powerpc/platforms/pseries/processor_idle.c | 4 ++++
2 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 811b7e7..b286fb7 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -382,6 +382,7 @@ static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32)
}
#endif
+extern unsigned long boot_option_idle_override;
enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
#endif /* __KERNEL__ */
diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c
index b5addd7..5f74b4e 100644
--- a/arch/powerpc/platforms/pseries/processor_idle.c
+++ b/arch/powerpc/platforms/pseries/processor_idle.c
@@ -260,6 +260,10 @@ static int pseries_idle_probe(void)
return -EPERM;
}
+ if (boot_option_idle_override != IDLE_NO_OVERRIDE) {
+ return -ENODEV;
+ }
+
if (!firmware_has_feature(FW_FEATURE_SPLPAR)) {
printk(KERN_DEBUG "Using default idle\n");
return -ENODEV;
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