| Message ID | 20210407154535.70756-1-krzysztof.kozlowski@canonical.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | memory: samsung: exynos5422-dmc: handle clk_set_parent() failure | expand |
Hi Krzysztof, On 4/7/21 4:45 PM, Krzysztof Kozlowski wrote: > clk_set_parent() can fail and ignoring such case could lead to invalid > clock setup for given frequency. > > Addresses-Coverity: Unchecked return value > Fixes: 6e7674c3c6df ("memory: Add DMC driver for Exynos5422") > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> > --- > drivers/memory/samsung/exynos5422-dmc.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c > index 56f6e65d40cd..9c8318923ed0 100644 > --- a/drivers/memory/samsung/exynos5422-dmc.c > +++ b/drivers/memory/samsung/exynos5422-dmc.c > @@ -1293,7 +1293,9 @@ static int exynos5_dmc_init_clks(struct exynos5_dmc *dmc) > > dmc->curr_volt = target_volt; > > - clk_set_parent(dmc->mout_mx_mspll_ccore, dmc->mout_spll); > + ret = clk_set_parent(dmc->mout_mx_mspll_ccore, dmc->mout_spll); > + if (ret) > + return ret; > > clk_prepare_enable(dmc->fout_bpll); > clk_prepare_enable(dmc->mout_bpll); > Thanks for running these tests and for the patch. I've checked how many many places this function is used in the kernel and return is ignored - in a lot of places... This patch LGTM. Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Regards, Lukasz
On Wed, 7 Apr 2021 17:45:35 +0200, Krzysztof Kozlowski wrote: > clk_set_parent() can fail and ignoring such case could lead to invalid > clock setup for given frequency. Applied, thanks! [1/1] memory: samsung: exynos5422-dmc: handle clk_set_parent() failure commit: 132c17c3ff878c7beaba51bdd275d5cc654c0e33 Best regards,
diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c index 56f6e65d40cd..9c8318923ed0 100644 --- a/drivers/memory/samsung/exynos5422-dmc.c +++ b/drivers/memory/samsung/exynos5422-dmc.c @@ -1293,7 +1293,9 @@ static int exynos5_dmc_init_clks(struct exynos5_dmc *dmc) dmc->curr_volt = target_volt; - clk_set_parent(dmc->mout_mx_mspll_ccore, dmc->mout_spll); + ret = clk_set_parent(dmc->mout_mx_mspll_ccore, dmc->mout_spll); + if (ret) + return ret; clk_prepare_enable(dmc->fout_bpll); clk_prepare_enable(dmc->mout_bpll);
clk_set_parent() can fail and ignoring such case could lead to invalid clock setup for given frequency. Addresses-Coverity: Unchecked return value Fixes: 6e7674c3c6df ("memory: Add DMC driver for Exynos5422") Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> --- drivers/memory/samsung/exynos5422-dmc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)