The return value of devm_clk_get() needs to be checked.
To avoid use of error pointer in case of the failure of alloc.
Fixes: 6078c651947a ("soc: mediatek: Refine scpsys to support multiple platform")
Signed-off-by: Jiasheng Jiang <[email protected]>
---
Changelog:
v3 -> v4
*Change 1. Change the "-ENOMEM" to "ERR_PTR(-ENOMEM)".
*Change 2. Add the IS_ERR to check the error code from devm_clk_get().
*Change 3. Change back the "ERR_PTR(-ENOMEM)" to "-ENOMEM".
---
drivers/soc/mediatek/mtk-scpsys.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-scpsys.c b/drivers/soc/mediatek/mtk-scpsys.c
index ca75b14931ec..778d6ffc42b8 100644
--- a/drivers/soc/mediatek/mtk-scpsys.c
+++ b/drivers/soc/mediatek/mtk-scpsys.c
@@ -411,12 +411,16 @@ static int scpsys_power_off(struct generic_pm_domain *genpd)
return ret;
}
-static void init_clks(struct platform_device *pdev, struct clk **clk)
+static int init_clks(struct platform_device *pdev, struct clk **clk)
{
int i;
- for (i = CLK_NONE + 1; i < CLK_MAX; i++)
+ for (i = CLK_NONE + 1; i < CLK_MAX; i++) {
clk[i] = devm_clk_get(&pdev->dev, clk_names[i]);
+ if (IS_ERR(clk[i]))
+ return -ENOMEM;
+ }
+ return 0;
}
static struct scp *init_scp(struct platform_device *pdev,
@@ -426,7 +430,7 @@ static struct scp *init_scp(struct platform_device *pdev,
{
struct genpd_onecell_data *pd_data;
struct resource *res;
- int i, j;
+ int i, j, ret;
struct scp *scp;
struct clk *clk[CLK_MAX];
@@ -481,7 +485,9 @@ static struct scp *init_scp(struct platform_device *pdev,
pd_data->num_domains = num;
- init_clks(pdev, clk);
+ ret = init_clks(pdev, clk);
+ if (ret)
+ return ERR_PTR(-ENOMEM);
for (i = 0; i < num; i++) {
struct scp_domain *scpd = &scp->domains[i];
--
2.25.1
On Fri, Dec 17, 2021 at 10:35:51PM +0800, Jiasheng Jiang wrote:
> The return value of devm_clk_get() needs to be checked.
> To avoid use of error pointer in case of the failure of alloc.
Please don't ignore review comments, people are generally making them
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