linux-kernel - [PATCH 09/13] staging: r8188eu: clean up on_action

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Message-Id: <20221029172337.1574593-10-martin@kaiser.cx>
Date:   Sat, 29 Oct 2022 19:23:33 +0200
From:   Martin Kaiser <martin@...ser.cx>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Michael Straube <straube.linux@...il.com>,
        Pavel Skripkin <paskripkin@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Martin Kaiser <martin@...ser.cx>
Subject: [PATCH 09/13] staging: r8188eu: clean up on_action_public

Use the struct mgmt to read the action_code. This is much simpler than
parsing the message ourselves.

Add a comment about reading the action code. All members of the action
enum start with an action_code byte. It does not matter which member we
use.

Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index 40539fa3b5a2..b3cef3504ad3 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -3813,24 +3813,16 @@ static unsigned int on_action_public_default(struct recv_frame *precv_frame)
 static void on_action_public(struct adapter *padapter, struct recv_frame *precv_frame)
 {
 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)precv_frame->rx_data;
-	unsigned int ret = _FAIL;
-	u8 *pframe = precv_frame->rx_data;
-	u8 *frame_body = pframe + sizeof(struct ieee80211_hdr_3addr);
-	u8 action;
 
 	/* check RA matches or not */
 	if (memcmp(myid(&padapter->eeprompriv), mgmt->da, ETH_ALEN))
 		return;
 
-	action = frame_body[1];
-	switch (action) {
-	case ACT_PUBLIC_VENDOR:
-		ret = on_action_public_vendor(precv_frame);
-		break;
-	default:
-		ret = on_action_public_default(precv_frame);
-		break;
-	}
+	/* All members of the action enum start with action_code. */
+	if (mgmt->u.action.u.s1g.action_code == WLAN_PUB_ACTION_VENDOR_SPECIFIC)
+		on_action_public_vendor(precv_frame);
+	else
+		on_action_public_default(precv_frame);
 }
 
 static void OnAction_p2p(struct adapter *padapter, struct recv_frame *precv_frame)
-- 
2.30.2