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

Commit Message

Xiaoke Wang April 7, 2022, 9:33 a.m. UTC

From: Xiaoke Wang <[e-mail]>

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 <[e-mail]>
---
ChangeLog:
v1->v2 stop trying to allocate more and return an error.
 drivers/clk/pxa/clk-pxa.c | 2 ++
 1 file changed, 2 insertions(+)

--

Comments

Stephen Boyd Oct. 3, 2022, 7:32 p.m. UTC | #1

Quoting [e-mail] (2022-04-07 02:33:49)
> From: Xiaoke Wang <[e-mail]>
> 
> 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 <[e-mail]>
> ---

Applied to clk-next

Patch

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;