[PATCH 5.11 287/601] memory: samsung: exynos5422-dmc: handle clk_set_parent() failure

Greg Kroah-Hartman
2021-05-12T17:29:23Z

From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

[ Upstream commit 132c17c3ff878c7beaba51bdd275d5cc654c0e33 ]

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>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20210407154535.70756-1-krzysztof.kozlowski@canonical.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 c5ee4121a4d2..3d230f07eaf2 100644
--- a/drivers/memory/samsung/exynos5422-dmc.c
+++ b/drivers/memory/samsung/exynos5422-dmc.c
@@ -1298,7 +1298,9 @@ 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);
--
2.30.2