[PATCH] powerpc/smp: Do not BUG_ON if invalid CPU during kick

[Santosh Sivaraj]

During secondary start, we do not need to BUG_ON if an invalid CPU number
is passed. We alreay print an error if secondary cannot be started, so
just return an error instead.

Signed-off-by: Santosh Sivaraj <santosh at fossix.org>
---
 arch/powerpc/kernel/smp.c            | 3 ++-
 arch/powerpc/platforms/cell/smp.c    | 3 ++-
 arch/powerpc/platforms/powernv/smp.c | 3 ++-
 arch/powerpc/platforms/pseries/smp.c | 3 ++-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index df2a416..05bf583 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -112,7 +112,8 @@ int smp_generic_cpu_bootable(unsigned int nr)
 #ifdef CONFIG_PPC64
 int smp_generic_kick_cpu(int nr)
 {
-	BUG_ON(nr < 0 || nr >= NR_CPUS);
+	if (nr < 0 || nr >= NR_CPUS)
+		return -EINVAL;
 
 	/*
 	 * The processor is currently spinning, waiting for the
diff --git a/arch/powerpc/platforms/cell/smp.c b/arch/powerpc/platforms/cell/smp.c
index 895560f..ee8c535 100644
--- a/arch/powerpc/platforms/cell/smp.c
+++ b/arch/powerpc/platforms/cell/smp.c
@@ -115,7 +115,8 @@ static void smp_cell_setup_cpu(int cpu)
 
 static int smp_cell_kick_cpu(int nr)
 {
-	BUG_ON(nr < 0 || nr >= NR_CPUS);
+	if (nr < 0 || nr >= NR_CPUS)
+		return -EINVAL;
 
 	if (!smp_startup_cpu(nr))
 		return -ENOENT;
diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c
index c04c87a..292825f 100644
--- a/arch/powerpc/platforms/powernv/smp.c
+++ b/arch/powerpc/platforms/powernv/smp.c
@@ -63,7 +63,8 @@ static int pnv_smp_kick_cpu(int nr)
 	long rc;
 	uint8_t status;
 
-	BUG_ON(nr < 0 || nr >= NR_CPUS);
+	if (nr < 0 || nr >= NR_CPUS)
+		return -EINVAL;
 
 	/*
 	 * If we already started or OPAL is not supported, we just
diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c
index 52ca6b3..c82182a 100644
--- a/arch/powerpc/platforms/pseries/smp.c
+++ b/arch/powerpc/platforms/pseries/smp.c
@@ -151,7 +151,8 @@ static void smp_setup_cpu(int cpu)
 
 static int smp_pSeries_kick_cpu(int nr)
 {
-	BUG_ON(nr < 0 || nr >= NR_CPUS);
+	if (nr < 0 || nr >= NR_CPUS)
+		return -EINVAL;
 
 	if (!smp_startup_cpu(nr))
 		return -ENOENT;
-- 
2.9.4