linux-kernel - [PATCH 02/14] staging:rtl8192u: Remove union from aci_aifsn

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Message-Id: <20180731210005.17452-3-johnfwhitmore@gmail.com>
Date:   Tue, 31 Jul 2018 21:59:53 +0100
From:   John Whitmore <johnfwhitmore@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     devel@...verdev.osuosl.org, gregkh@...uxfoundation.org,
        John Whitmore <johnfwhitmore@...il.com>
Subject: [PATCH 02/14] staging:rtl8192u: Remove union from aci_aifsn - Style

The union aci_aifsn is not used as a union, but only as a struct.
The union seems to have been used to ensure that the size of the
structure was only a single byte. That size is set by the bitfield
structure, adding a union with an unused byte adds nothing.

The union has been removed. This is a coding style change and
should not impact runtime code execution.

Signed-off-by: John Whitmore <johnfwhitmore@...il.com>
---
 .../staging/rtl8192u/ieee80211/rtl819x_Qos.h  | 23 ++++++++-----------
 drivers/staging/rtl8192u/r8192U_dm.c          |  4 ++--
 2 files changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h b/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h
index 810d81addcf6..1f16d1692c03 100644
--- a/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h
+++ b/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h
@@ -2,19 +2,16 @@
 #ifndef __INC_QOS_TYPE_H
 #define __INC_QOS_TYPE_H
 
-//
-// ACI/AIFSN Field.
-// Ref: WMM spec 2.2.2: WME Parameter Element, p.12.
-//
-union aci_aifsn {
-	u8	char_data;
-
-	struct {
-		u8	aifsn:4;
-		u8	acm:1;
-		u8	aci:2;
-		u8	reserved:1;
-	} f;	// Field
+/*
+ * ACI/AIFSN Field.
+ * Ref: WMM spec 2.2.2: WME Parameter Element, p.12.
+ * Note: 1 Byte Length
+ */
+struct aci_aifsn {
+	u8	aifsn:4;
+	u8	acm:1;
+	u8	aci:2;
+	u8:1;
 };
 
 //
diff --git a/drivers/staging/rtl8192u/r8192U_dm.c b/drivers/staging/rtl8192u/r8192U_dm.c
index 92ba1fdd9831..0ba1b1e2bc6e 100644
--- a/drivers/staging/rtl8192u/r8192U_dm.c
+++ b/drivers/staging/rtl8192u/r8192U_dm.c
@@ -2242,12 +2242,12 @@ static void dm_check_edca_turbo(
 			{
 				/*  TODO:  Modified this part and try to set acm control in only 1 IO processing!! */
 
-				union aci_aifsn *pAciAifsn = (union aci_aifsn *)&(qos_parameters->aifs[0]);
+				struct aci_aifsn *pAciAifsn = (struct aci_aifsn *)&(qos_parameters->aifs[0]);
 				u8		AcmCtrl;
 
 				read_nic_byte(dev, AcmHwCtrl, &AcmCtrl);
 
-				if (pAciAifsn->f.acm) { /*  acm bit is 1. */
+				if (pAciAifsn->acm) { /*  acm bit is 1. */
 					AcmCtrl |= AcmHw_BeqEn;
 				} else {	/* ACM bit is 0. */
 					AcmCtrl &= (~AcmHw_BeqEn);
-- 
2.18.0