crypto: stm32/hash - Fix PM reference leak on stm32-hash.c

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 <liushixin2@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c
index 7ac0573..389de9e 100644 (file)
--- 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;