Re: [PATCH 7/9] crypto: qce - use __free() for a buffer that's always freed

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On 03/12/2024 10:19, Bartosz Golaszewski wrote:
From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

The buffer allocated in qce_ahash_hmac_setkey is always freed before
returning to use __free() to automate it.

I think you wanted to use "so" instead of "to", otherwise it means nothing ^^


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
---
  drivers/crypto/qce/sha.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
index fc72af8aa9a72..916908c04b635 100644
--- a/drivers/crypto/qce/sha.c
+++ b/drivers/crypto/qce/sha.c
@@ -3,6 +3,7 @@
   * Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
   */
+#include <linux/cleanup.h>
  #include <linux/device.h>
  #include <linux/dma-mapping.h>
  #include <linux/interrupt.h>
@@ -336,7 +337,6 @@ static int qce_ahash_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
  	struct scatterlist sg;
  	unsigned int blocksize;
  	struct crypto_ahash *ahash_tfm;
-	u8 *buf;
  	int ret;
  	const char *alg_name;
@@ -370,7 +370,8 @@ static int qce_ahash_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
  				   crypto_req_done, &wait);
  	crypto_ahash_clear_flags(ahash_tfm, ~0);
- buf = kzalloc(keylen + QCE_MAX_ALIGN_SIZE, GFP_KERNEL);
+	u8 *buf __free(kfree) = kzalloc(keylen + QCE_MAX_ALIGN_SIZE,
+					GFP_KERNEL);
  	if (!buf) {
  		ret = -ENOMEM;
  		goto err_free_req;
@@ -382,7 +383,6 @@ static int qce_ahash_hmac_setkey(struct crypto_ahash *tfm, const u8 *key,
ret = crypto_wait_req(crypto_ahash_digest(req), &wait); - kfree(buf);
  err_free_req:
  	ahash_request_free(req);
  err_free_ahash:


With the typo fixes:

Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>





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