From: Lokesh Vutla Date: Wed, 13 Mar 2013 06:52:33 +0000 (+0000) Subject: ARM: hw_breakpoint: Enable debug powerdown only if system supports 'has_ossr' X-Git-Tag: firefly_0821_release~3680^2~237^2^3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8aa6a97721cc5146ee3e70cd477e10c4d0047d0c;p=firefly-linux-kernel-4.4.55.git ARM: hw_breakpoint: Enable debug powerdown only if system supports 'has_ossr' Commit {9a6eb31 ARM: hw_breakpoint: Debug powerdown support for self-hosted debug} introduces debug powerdown support for self-hosted debug. While merging the patch 'has_ossr' check was removed which was needed for hardwares which doesn't support self-hosted debug. Pandaboard (A9) is one such hardware and Dietmar's orginial patch did mention this issue. Without that check on Panda with CPUIDLE enabled, a flood of below messages thrown. [ 3.597930] hw-breakpoint: CPU 0 failed to disable vector catch [ 3.597991] hw-breakpoint: CPU 1 failed to disable vector catch So restore that check back to avoid the mentioned issue. Cc: Dietmar Eggemann Cc: Will Deacon Reported-by: Santosh Shilimkar Acked-by: Santosh Shilimkar Signed-off-by: Lokesh Vutla --- diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index 1fd749ee4a1b..1b803117ed91 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -1049,7 +1049,8 @@ static struct notifier_block dbg_cpu_pm_nb = { static void __init pm_init(void) { - cpu_pm_register_notifier(&dbg_cpu_pm_nb); + if (has_ossr) + cpu_pm_register_notifier(&dbg_cpu_pm_nb); } #else static inline void pm_init(void)