linux-kernel - [PATCH 4.18 006/168] cfg80211: remove division by size of sizeof(struct ieee80211_wmm

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Date:   Mon,  8 Oct 2018 20:29:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Johannes Berg <johannes.berg@...el.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 006/168] cfg80211: remove division by size of sizeof(struct ieee80211_wmm_rule)

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Berg <johannes.berg@...el.com>

[ Upstream commit 8a54d8fc160e67ad485d95a0322ce1221f80770a ]

Pointer arithmetic already adjusts by the size of the struct,
so the sizeof() calculation is wrong. This is basically the
same as Colin King's patch for similar code in the iwlwifi
driver.

Fixes: 230ebaa189af ("cfg80211: read wmm rules from regulatory database")
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/wireless/reg.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -452,8 +452,7 @@ reg_copy_regd(const struct ieee80211_reg
 			continue;
 
 		regd->reg_rules[i].wmm_rule = d_wmm +
-			(src_regd->reg_rules[i].wmm_rule - s_wmm) /
-			sizeof(struct ieee80211_wmm_rule);
+			(src_regd->reg_rules[i].wmm_rule - s_wmm);
 	}
 	return regd;
 }