[PATCH for v4.19-stable 2/6] reset: core: fix reset_control_put

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From: Heiner Kallweit <hkallweit1@xxxxxxxxx>

commit 4891486fb2c80eaf3bb0f9eb065d15ecd357702f upstream.

Commit "reset: make optional functions really optional" missed to
adjust one check in reset_control_put, causing a NULL pointer
access for optional resets.

Fixes: bb475230b8e5 "reset: make optional functions really optional"
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
 drivers/reset/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/reset/core.c b/drivers/reset/core.c
index 75821417b799..f62f57ebc45a 100644
--- a/drivers/reset/core.c
+++ b/drivers/reset/core.c
@@ -358,7 +358,7 @@ EXPORT_SYMBOL_GPL(__of_reset_control_get);
 
 void reset_control_put(struct reset_control *rstc)
 {
-	if (IS_ERR(rstc))
+	if (IS_ERR_OR_NULL(rstc))
 		return;
 
 	mutex_lock(&reset_list_mutex);
-- 
2.17.1




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