From: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Date: Fri, 4 May 2018 04:16:45 +0000 (+0200)
Subject: staging: ks7010: use CIRC_CNT_TO_END macro in cnt_smeqbody
X-Git-Tag: v4.18-rc1~83^2~338
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5089cd418962823ff3a1ed1a0ec6a7d764fac27b;p=thirdparty%2Fkernel%2Flinux.git

staging: ks7010: use CIRC_CNT_TO_END macro in cnt_smeqbody

This commit changes custom implementation of CIRC_CNT_TO_END.
Just use the linux kernel header one to simplify code.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/ks7010/ks_hostif.c b/drivers/staging/ks7010/ks_hostif.c
index 359187e1009b4..7a511231225fe 100644
--- a/drivers/staging/ks7010/ks_hostif.c
+++ b/drivers/staging/ks7010/ks_hostif.c
@@ -6,6 +6,7 @@
  *   Copyright (C) 2009 Renesas Technology Corp.
  */
 
+#include <linux/circ_buf.h>
 #include <linux/if_arp.h>
 #include <net/iw_handler.h>
 #include <uapi/linux/llc.h>
@@ -26,9 +27,8 @@ static inline void inc_smeqtail(struct ks_wlan_private *priv)
 
 static inline unsigned int cnt_smeqbody(struct ks_wlan_private *priv)
 {
-	unsigned int sme_cnt = priv->sme_i.qtail - priv->sme_i.qhead;
-
-	return (sme_cnt + SME_EVENT_BUFF_SIZE) % SME_EVENT_BUFF_SIZE;
+	return CIRC_CNT_TO_END(priv->sme_i.qhead, priv->sme_i.qtail,
+			       SME_EVENT_BUFF_SIZE);
 }
 
 static inline u8 get_byte(struct ks_wlan_private *priv)