Ensure i2s->op_clk is not used when clk_get() for this clock fails.
This prevents working with an incorrectly configured clock in some
conditions.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
---
sound/soc/samsung/i2s.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index ae02811..a634a66 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -488,7 +488,7 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
clk_id = 1;
if (!any_active(i2s)) {
- if (i2s->op_clk) {
+ if (i2s->op_clk && !IS_ERR(i2s->op_clk)) {
if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
(!clk_id && (mod & MOD_IMS_SYSMUX))) {
clk_disable_unprepare(i2s->op_clk);
@@ -506,6 +506,10 @@ static int i2s_set_sysclk(struct snd_soc_dai *dai,
else
i2s->op_clk = clk_get(&i2s->pdev->dev,
"i2s_opclk0");
+
+ if (WARN_ON(IS_ERR(i2s->op_clk)))
+ return PTR_ERR(i2s->op_clk);
+
clk_prepare_enable(i2s->op_clk);
i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
--
1.7.9.5
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