linux-kernel - [PATCH v2 1/3] staging: r8188eu: use a qos_hdr in validate_recv_data

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Message-Id: <20221107202824.61431-2-martin@kaiser.cx>
Date:   Mon,  7 Nov 2022 21:28:22 +0100
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>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: [PATCH v2 1/3] staging: r8188eu: use a qos_hdr in validate_recv_data_frame

Define a struct ieee80211_qos_hdr in the validate_recv_data_frame
function. Use this struct to replace some numeric offsets and make the
code easier to understand.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Martin Kaiser <martin@...ser.cx>
---
Changes in v2
- fixed hdrlen calculation

 drivers/staging/r8188eu/core/rtw_recv.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_recv.c b/drivers/staging/r8188eu/core/rtw_recv.c
index cb0f35d7ab98..5b0a66aebff1 100644
--- a/drivers/staging/r8188eu/core/rtw_recv.c
+++ b/drivers/staging/r8188eu/core/rtw_recv.c
@@ -1032,7 +1032,6 @@ static int validate_recv_data_frame(struct adapter *adapter,
 				    struct recv_frame *precv_frame)
 {
 	struct sta_info *psta = NULL;
-	u8 *ptr = precv_frame->rx_data;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)precv_frame->rx_data;
 	struct rx_pkt_attrib	*pattrib = &precv_frame->attrib;
 	struct security_priv	*psecuritypriv = &adapter->securitypriv;
@@ -1071,10 +1070,12 @@ static int validate_recv_data_frame(struct adapter *adapter,
 	pattrib->ack_policy = 0;
 	/* parsing QC field */
 	if (pattrib->qos) {
+		struct ieee80211_qos_hdr *qos_hdr = (struct ieee80211_qos_hdr *)hdr;
+
 		pattrib->priority = ieee80211_get_tid(hdr);
-		pattrib->ack_policy = GetAckpolicy((ptr + 24));
-		pattrib->amsdu = GetAMsdu((ptr + 24));
-		pattrib->hdrlen = 26;
+		pattrib->ack_policy = GetAckpolicy(&qos_hdr->qos_ctrl);
+		pattrib->amsdu = GetAMsdu(&qos_hdr->qos_ctrl);
+		pattrib->hdrlen = sizeof(*qos_hdr);
 
 		if (pattrib->priority != 0 && pattrib->priority != 3)
 			adapter->recvpriv.bIsAnyNonBEPkts = true;
-- 
2.30.2