linux-kernel - [PATCH 1/3 v4] Staging: rtl8192u: Simplify error check code at prism2_wep

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Date:	Thu, 21 May 2015 02:25:17 +0200
From:	Pedro Marzo Perez <marzo.pedro@...il.com>
To:	gregkh@...uxfoundation.org, navyasri.tech@...il.com,
	dilekuzulmez@...il.com, joe@...ches.com, haticeerturk27@...il.com
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3 v4] Staging: rtl8192u: Simplify error check code at prism2_wep_init

Simplify prism2_wep_init error check code employing goto when a failure is detected.
Removed pr_debug which was given a checkpatch.pl error because of literal string
 splitted across two lines of code, it was seldom going to be printed anyway.

Signed-off-by: Pedro Marzo Perez <marzo.pedro@...il.com>
---
 .../rtl8192u/ieee80211/ieee80211_crypt_wep.c       | 32 ++++++----------------
 1 file changed, 9 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c
index 0a17f84..bd789d1 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c
@@ -43,38 +43,24 @@ static void *prism2_wep_init(int keyidx)
 
 	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
 	if (priv == NULL)
-		goto fail;
+		return NULL;
 	priv->key_idx = keyidx;
 
 	priv->tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(priv->tx_tfm)) {
-		pr_debug("ieee80211_crypt_wep: could not allocate "
-		       "crypto API arc4\n");
-		priv->tx_tfm = NULL;
-		goto fail;
-	}
+	if (IS_ERR(priv->tx_tfm))
+		goto free_priv;
 	priv->rx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(priv->rx_tfm)) {
-		pr_debug("ieee80211_crypt_wep: could not allocate "
-		       "crypto API arc4\n");
-		priv->rx_tfm = NULL;
-		goto fail;
-	}
+	if (IS_ERR(priv->rx_tfm))
+		goto free_tx;
 
 	/* start WEP IV from a random value */
 	get_random_bytes(&priv->iv, 4);
 
 	return priv;
-
-fail:
-	if (priv) {
-		if (priv->tx_tfm)
-			crypto_free_blkcipher(priv->tx_tfm);
-		if (priv->rx_tfm)
-			crypto_free_blkcipher(priv->rx_tfm);
-		kfree(priv);
-	}
-
+free_tx:
+	crypto_free_blkcipher(priv->tx_tfm);
+free_priv:
+	kfree(priv);
 	return NULL;
 }
 
-- 
1.9.1

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