diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 2393d3c46236..6a81a451d767 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -279,6 +279,14 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) void system_reset_exception(struct pt_regs *regs) { + /* + * Avoid crashes in case of nested NMI exceptions. Recoverability + * is determined by RI and in_nmi + */ + bool nested = in_nmi(); + if (!nested) + nmi_enter(); + /* See if any machine dependent calls */ if (ppc_md.system_reset_exception) { if (ppc_md.system_reset_exception(regs)) @@ -297,6 +305,9 @@ out: if (!(regs->msr & MSR_RI)) panic("Unrecoverable System Reset"); + if (!nested) + nmi_exit(); + /* What should we do here? We could issue a shutdown or hard reset. */ } |