[PATCH v2] clk: pxa: add a check for the return value of kzalloc()

xkernel.wang
2022-04-07T09:34:21Z

From: Xiaoke Wang <xkernel.wang@foxmail.com>

kzalloc() is a memory allocation function which can return NULL when
some internal memory errors happen. So it is better to check it to
prevent potential wrong memory access.

Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
---
ChangeLog:
v1->v2 stop trying to allocate more and return an error.
drivers/clk/pxa/clk-pxa.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/clk/pxa/clk-pxa.c b/drivers/clk/pxa/clk-pxa.c
index cfc79f9..be6b950 100644
--- a/drivers/clk/pxa/clk-pxa.c
+++ b/drivers/clk/pxa/clk-pxa.c
@@ -102,6 +102,8 @@ int __init clk_pxa_cken_init(const struct desc_clk_cken *clks, int nb_clks)

for (i = 0; i < nb_clks; i++) {
pxa_clk = kzalloc(sizeof(*pxa_clk), GFP_KERNEL);
+ if (!pxa_clk)
+ return -ENOMEM;
pxa_clk->is_in_low_power = clks[i].is_in_low_power;
pxa_clk->lp = clks[i].lp;
pxa_clk->hp = clks[i].hp;
--