[-next,4/7] crypto: stm32/hash - Fix PM reference leak on stm32-hash.c

Commit Message

Liu Shixin April 8, 2021, 7:18 a.m. UTC

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Signed-off-by: Shixin Liu <[e-mail]>
---
 drivers/crypto/stm32/stm32-hash.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index 7ac0573ef663..389de9e3302d 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -813,7 +813,7 @@  static void stm32_hash_finish_req(struct ahash_request *req, int err)
 static int stm32_hash_hw_init(struct stm32_hash_dev *hdev,
 			      struct stm32_hash_request_ctx *rctx)
 {
-	pm_runtime_get_sync(hdev->dev);
+	pm_runtime_resume_and_get(hdev->dev);
 
 	if (!(HASH_FLAGS_INIT & hdev->flags)) {
 		stm32_hash_write(hdev, HASH_CR, HASH_CR_INIT);
@@ -962,7 +962,7 @@  static int stm32_hash_export(struct ahash_request *req, void *out)
 	u32 *preg;
 	unsigned int i;
 
-	pm_runtime_get_sync(hdev->dev);
+	pm_runtime_resume_and_get(hdev->dev);
 
 	while ((stm32_hash_read(hdev, HASH_SR) & HASH_SR_BUSY))
 		cpu_relax();
@@ -1000,7 +1000,7 @@  static int stm32_hash_import(struct ahash_request *req, const void *in)
 
 	preg = rctx->hw_context;
 
-	pm_runtime_get_sync(hdev->dev);
+	pm_runtime_resume_and_get(hdev->dev);
 
 	stm32_hash_write(hdev, HASH_IMR, *preg++);
 	stm32_hash_write(hdev, HASH_STR, *preg++);
@@ -1566,7 +1566,7 @@  static int stm32_hash_remove(struct platform_device *pdev)
 	if (!hdev)
 		return -ENODEV;
 
-	ret = pm_runtime_get_sync(hdev->dev);
+	ret = pm_runtime_resume_and_get(hdev->dev);
 	if (ret < 0)
 		return ret;