From b1b20e7155de612f065dbc0cda53186605fa944c Mon Sep 17 00:00:00 2001 From: Bhaktipriya Shridhar Date: Sun, 21 Feb 2016 15:43:00 +0530 Subject: [PATCH] staging: rtl8192u: ieee80211: Use macro DIV_ROUND_UP The macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /(d)). It clarifies the divisor calculations. This was done using the coccinelle script: @@ expression e1; expression e2; @@ ( - ((e1) + e2 - 1) / (e2) + DIV_ROUND_UP(e1,e2) | - ((e1) + (e2 - 1)) / (e2) + DIV_ROUND_UP(e1,e2) ) Signed-off-by: Bhaktipriya Shridhar Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c index 27ce4817faeb..2dc25cc2c726 100644 --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_crypt_ccmp.c @@ -242,7 +242,7 @@ static int ieee80211_ccmp_encrypt(struct sk_buff *skb, int hdr_len, void *priv) ccmp_init_blocks(key->tfm, hdr, key->tx_pn, data_len, b0, b, s0); - blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN; + blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN); last = data_len % AES_BLOCK_LEN; for (i = 1; i <= blocks; i++) { @@ -331,7 +331,7 @@ static int ieee80211_ccmp_decrypt(struct sk_buff *skb, int hdr_len, void *priv) ccmp_init_blocks(key->tfm, hdr, pn, data_len, b0, a, b); xor_block(mic, b, CCMP_MIC_LEN); - blocks = (data_len + AES_BLOCK_LEN - 1) / AES_BLOCK_LEN; + blocks = DIV_ROUND_UP(data_len, AES_BLOCK_LEN); last = data_len % AES_BLOCK_LEN; for (i = 1; i <= blocks; i++) {