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Date:   Sat, 15 Apr 2023 15:51:39 +0200
From:   Luke Koch <lu.ale.koch@gmail.com>
To:     error27@gmail.com
Cc:     gregkh@linuxfoundation.org, linux-staging@lists.linux.dev,
        linux-kernel@vger.kernel.org
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Subject: [PATCH v2] staging: wlan-ng: replace rate macros
Reply-To: <714c5d3f-438a-4633-a46e-127f876ffec4@kili.mountain>

Change p80211msg_dot11req_scan_results rate members to struct arrays
instead of individually numbered member structs.
Replace macros to set rates with loops to avoid checkpatch warning
and adhere to linux coding style.

Reported by checkpatch:

CHECK: Macro argument reuse 'N' - possible side-effects?

Signed off by: Luke Koch <lu.ale.koch@gmail.com>
---
v2: - Fix array underflow and conditions with respect to the start at 0
---
 drivers/staging/wlan-ng/p80211metastruct.h | 18 +-------
 drivers/staging/wlan-ng/prism2mgmt.c       | 52 +++++++---------------
 2 files changed, 18 insertions(+), 52 deletions(-)

diff --git a/drivers/staging/wlan-ng/p80211metastruct.h b/drivers/staging/wlan-ng/p80211metastruct.h
index 4adc64580185..e963227f797c 100644
--- a/drivers/staging/wlan-ng/p80211metastruct.h
+++ b/drivers/staging/wlan-ng/p80211metastruct.h
@@ -114,22 +114,8 @@ struct p80211msg_dot11req_scan_results {
 	struct p80211item_uint32 cfpollreq;
 	struct p80211item_uint32 privacy;
 	struct p80211item_uint32 capinfo;
-	struct p80211item_uint32 basicrate1;
-	struct p80211item_uint32 basicrate2;
-	struct p80211item_uint32 basicrate3;
-	struct p80211item_uint32 basicrate4;
-	struct p80211item_uint32 basicrate5;
-	struct p80211item_uint32 basicrate6;
-	struct p80211item_uint32 basicrate7;
-	struct p80211item_uint32 basicrate8;
-	struct p80211item_uint32 supprate1;
-	struct p80211item_uint32 supprate2;
-	struct p80211item_uint32 supprate3;
-	struct p80211item_uint32 supprate4;
-	struct p80211item_uint32 supprate5;
-	struct p80211item_uint32 supprate6;
-	struct p80211item_uint32 supprate7;
-	struct p80211item_uint32 supprate8;
+	struct p80211item_uint32 basicrate[8];
+	struct p80211item_uint32 supprate[8];
 } __packed;
 
 struct p80211msg_dot11req_start {
diff --git a/drivers/staging/wlan-ng/prism2mgmt.c b/drivers/staging/wlan-ng/prism2mgmt.c
index 9030a8939a9b..79a259ab209b 100644
--- a/drivers/staging/wlan-ng/prism2mgmt.c
+++ b/drivers/staging/wlan-ng/prism2mgmt.c
@@ -437,42 +437,22 @@ int prism2mgmt_scan_results(struct wlandevice *wlandev, void *msgp)
 		if (item->supprates[count] == 0)
 			break;
 
-#define REQBASICRATE(N) \
-	do { \
-		if ((count >= (N)) && DOT11_RATE5_ISBASIC_GET(	\
-			item->supprates[(N) - 1])) { \
-			req->basicrate ## N .data = item->supprates[(N) - 1]; \
-			req->basicrate ## N .status = \
-				P80211ENUM_msgitem_status_data_ok; \
-		} \
-	} while (0)
-
-	REQBASICRATE(1);
-	REQBASICRATE(2);
-	REQBASICRATE(3);
-	REQBASICRATE(4);
-	REQBASICRATE(5);
-	REQBASICRATE(6);
-	REQBASICRATE(7);
-	REQBASICRATE(8);
-
-#define REQSUPPRATE(N) \
-	do { \
-		if (count >= (N)) {					\
-			req->supprate ## N .data = item->supprates[(N) - 1]; \
-			req->supprate ## N .status = \
-				P80211ENUM_msgitem_status_data_ok; \
-		} \
-	} while (0)
-
-	REQSUPPRATE(1);
-	REQSUPPRATE(2);
-	REQSUPPRATE(3);
-	REQSUPPRATE(4);
-	REQSUPPRATE(5);
-	REQSUPPRATE(6);
-	REQSUPPRATE(7);
-	REQSUPPRATE(8);
+	for (int i = 0; i < 8; i++) {
+		if (count > i &&
+		    DOT11_RATE5_ISBASIC_GET(item->supprates[i])) {
+			req->basicrate[i] .data = item->supprates[i];
+			req->basicrate[i] .status =
+				P80211ENUM_msgitem_status_data_ok;
+		}
+	}
+
+	for (int i = 0; i < 8; i++) {
+		if (count > i) {
+			req->supprate[i] .data = item->supprates[i];
+			req->supprate[i] .status =
+				P80211ENUM_msgitem_status_data_ok;
+		}
+	}
 
 	/* beacon period */
 	req->beaconperiod.status = P80211ENUM_msgitem_status_data_ok;
-- 
2.34.1