[PATCH] MIPS: OCTEON: irq: check for null return on kzalloc allocation

[Colin King]

From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

The allocation of host_data is not null checked, leading to a
null pointer dereference if the allocation fails. Fix this by
adding a null check and return with -ENOMEM.

Fixes: 64b139f97c01 ("MIPS: OCTEON: irq: add CIB and other fixes")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
---
 arch/mips/cavium-octeon/octeon-irq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
index b993d9f2c9b9..203e1d2a56d5 100644
--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -2277,6 +2277,8 @@ static int __init octeon_irq_init_cib(struct device_node *ciu_node,
 	}
 
 	host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
+	if (!host_data)
+		return -ENOMEM;
 	raw_spin_lock_init(&host_data->lock);
 
 	addr = of_get_address(ciu_node, 0, NULL, NULL);
-- 
2.15.1