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-rw-r--r--arch/powerpc/kernel/traps.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 2105767fcc5..5147175f921 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -211,6 +211,19 @@ void system_reset_exception(struct pt_regs *regs)
die("System Reset", regs, SIGABRT);
+ /*
+ * Some CPUs when released from the debugger will execute this path.
+ * These CPUs entered the debugger via a soft-reset. If the CPU was
+ * hung before entering the debugger it will return to the hung
+ * state when exiting this function. This causes a problem in
+ * kdump since the hung CPU(s) will not respond to the IPI sent
+ * from kdump. To prevent the problem we call crash_kexec_secondary()
+ * here. If a kdump had not been initiated or we exit the debugger
+ * with the "exit and recover" command (x) crash_kexec_secondary()
+ * will return after 5ms and the CPU returns to its previous state.
+ */
+ crash_kexec_secondary(regs);
+
/* Must die if the interrupt is not recoverable */
if (!(regs->msr & MSR_RI))
panic("Unrecoverable System Reset");