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Staging: rtl8192u: Simplify error check code at prism2_wep_init

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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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pedro Marzo Perez 2015-06-03 01:28:38 +02:00 committed by Greg Kroah-Hartman
parent bf95628e61
commit 251ae75c69
1 changed files with 9 additions and 23 deletions
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32
drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_wep.c
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@ -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;
}