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From: Michael Straube <straube.linux@gmail.com>
To: gregkh@linuxfoundation.org
Cc: Larry.Finger@lwfinger.net, phil@philpotter.co.uk,
	martin@kaiser.cx, fmdefrancesco@gmail.com,
	linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org,
	Michael Straube <straube.linux@gmail.com>
Subject: [PATCH 2/3] staging: r8188eu: convert type of second parameter of rtw_*_decrypt()
Date: Sun, 29 Aug 2021 13:25:54 +0200	[thread overview]
Message-ID: <20210829112555.8726-3-straube.linux@gmail.com> (raw)
In-Reply-To: <20210829112555.8726-1-straube.linux@gmail.com>

Convert the type of the second parameter of the rtw_*_decrypt() functions
to struct recv_frame.

All callers of the functions cast the type to (u8 *) and in the functions
it is casted back to the original type. Changing the type of the second
parameter to struct recv_frame avoids these unnecessary casts and improves
readability.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
---
 drivers/staging/r8188eu/core/rtw_recv.c       |  6 ++---
 drivers/staging/r8188eu/core/rtw_security.c   | 25 ++++++++++---------
 .../staging/r8188eu/include/rtw_security.h    |  6 ++---
 3 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_recv.c b/drivers/staging/r8188eu/core/rtw_recv.c
index e082edfbaad8..019c5364905b 100644
--- a/drivers/staging/r8188eu/core/rtw_recv.c
+++ b/drivers/staging/r8188eu/core/rtw_recv.c
@@ -418,13 +418,13 @@ static struct recv_frame *decryptor(struct adapter *padapter, struct recv_frame
 		switch (prxattrib->encrypt) {
 		case _WEP40_:
 		case _WEP104_:
-			rtw_wep_decrypt(padapter, (u8 *)precv_frame);
+			rtw_wep_decrypt(padapter, precv_frame);
 			break;
 		case _TKIP_:
-			res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
+			res = rtw_tkip_decrypt(padapter, precv_frame);
 			break;
 		case _AES_:
-			res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
+			res = rtw_aes_decrypt(padapter, precv_frame);
 			break;
 		default:
 			break;
diff --git a/drivers/staging/r8188eu/core/rtw_security.c b/drivers/staging/r8188eu/core/rtw_security.c
index 5168159d8ae7..0836f38ca284 100644
--- a/drivers/staging/r8188eu/core/rtw_security.c
+++ b/drivers/staging/r8188eu/core/rtw_security.c
@@ -134,7 +134,7 @@ void rtw_wep_encrypt(struct adapter *padapter, struct xmit_frame *pxmitframe)
 
 }
 
-void rtw_wep_decrypt(struct adapter  *padapter, u8 *precvframe)
+void rtw_wep_decrypt(struct adapter *padapter, struct recv_frame *precvframe)
 {
 	/*  exclude ICV */
 	struct arc4context	 mycontext;
@@ -142,10 +142,10 @@ void rtw_wep_decrypt(struct adapter  *padapter, u8 *precvframe)
 	u32	keylength;
 	u8	*pframe, *payload, *iv, wepkey[16];
 	u8	 keyindex;
-	struct	rx_pkt_attrib	 *prxattrib = &(((struct recv_frame *)precvframe)->attrib);
+	struct	rx_pkt_attrib	 *prxattrib = &precvframe->attrib;
 	struct	security_priv	*psecuritypriv = &padapter->securitypriv;
 
-	pframe = (unsigned char *)((struct recv_frame *)precvframe)->rx_data;
+	pframe = (unsigned char *)precvframe->rx_data;
 
 	/* start to decrypt recvframe */
 	if ((prxattrib->encrypt == _WEP40_) || (prxattrib->encrypt == _WEP104_)) {
@@ -154,7 +154,7 @@ void rtw_wep_decrypt(struct adapter  *padapter, u8 *precvframe)
 		keylength = psecuritypriv->dot11DefKeylen[keyindex];
 		memcpy(&wepkey[0], iv, 3);
 		memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[keyindex].skey[0], keylength);
-		length = ((struct recv_frame *)precvframe)->len - prxattrib->hdrlen - prxattrib->iv_len;
+		length = precvframe->len - prxattrib->hdrlen - prxattrib->iv_len;
 
 		payload = pframe + prxattrib->iv_len + prxattrib->hdrlen;
 
@@ -580,7 +580,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, struct xmit_frame *pxmitframe)
 }
 
 /* The hlen isn't include the IV */
-u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
+u32 rtw_tkip_decrypt(struct adapter *padapter, struct recv_frame *precvframe)
 {																	/*  exclude ICV */
 	u16 pnl;
 	u32 pnh;
@@ -596,11 +596,11 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
 	u8	*pframe, *payload, *iv, *prwskey;
 	union pn48 dot11txpn;
 	struct	sta_info		*stainfo;
-	struct	rx_pkt_attrib	 *prxattrib = &((struct recv_frame *)precvframe)->attrib;
+	struct	rx_pkt_attrib	 *prxattrib = &precvframe->attrib;
 	struct	security_priv	*psecuritypriv = &padapter->securitypriv;
 	u32		res = _SUCCESS;
 
-	pframe = (unsigned char *)((struct recv_frame *)precvframe)->rx_data;
+	pframe = (unsigned char *)precvframe->rx_data;
 
 	/* 4 start to decrypt recvframe */
 	if (prxattrib->encrypt == _TKIP_) {
@@ -619,7 +619,7 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
 
 			iv = pframe + prxattrib->hdrlen;
 			payload = pframe + prxattrib->iv_len + prxattrib->hdrlen;
-			length = ((struct recv_frame *)precvframe)->len - prxattrib->hdrlen - prxattrib->iv_len;
+			length = precvframe->len - prxattrib->hdrlen - prxattrib->iv_len;
 
 			GET_TKIP_PN(iv, dot11txpn);
 
@@ -1402,17 +1402,18 @@ static int aes_decipher(u8 *key, uint	hdrlen,
 	return res;
 }
 
-u32	rtw_aes_decrypt(struct adapter *padapter, u8 *precvframe)
+u32 rtw_aes_decrypt(struct adapter *padapter, struct recv_frame *precvframe)
 {	/*  exclude ICV */
 	/* Intermediate Buffers */
 	int		length;
 	u8	*pframe, *prwskey;	/*  *payload,*iv */
 	struct	sta_info		*stainfo;
-	struct	rx_pkt_attrib	 *prxattrib = &((struct recv_frame *)precvframe)->attrib;
+	struct	rx_pkt_attrib	 *prxattrib = &precvframe->attrib;
 	struct	security_priv	*psecuritypriv = &padapter->securitypriv;
 	u32	res = _SUCCESS;
 
-	pframe = (unsigned char *)((struct recv_frame *)precvframe)->rx_data;
+	pframe = (unsigned char *)precvframe->rx_data;
+
 	/* 4 start to encrypt each fragment */
 	if (prxattrib->encrypt == _AES_) {
 		stainfo = rtw_get_stainfo(&padapter->stapriv, &prxattrib->ta[0]);
@@ -1434,7 +1435,7 @@ u32	rtw_aes_decrypt(struct adapter *padapter, u8 *precvframe)
 			} else {
 				prwskey = &stainfo->dot118021x_UncstKey.skey[0];
 			}
-			length = ((struct recv_frame *)precvframe)->len - prxattrib->hdrlen - prxattrib->iv_len;
+			length = precvframe->len - prxattrib->hdrlen - prxattrib->iv_len;
 			res = aes_decipher(prwskey, prxattrib->hdrlen, pframe, length);
 		} else {
 			res = _FAIL;
diff --git a/drivers/staging/r8188eu/include/rtw_security.h b/drivers/staging/r8188eu/include/rtw_security.h
index 4e6d4257b7ba..1fc1a4f30eec 100644
--- a/drivers/staging/r8188eu/include/rtw_security.h
+++ b/drivers/staging/r8188eu/include/rtw_security.h
@@ -333,9 +333,9 @@ void rtw_seccalctkipmic(u8 *key, u8 *header, u8 *data, u32 data_len,
 u32 rtw_aes_encrypt(struct adapter *padapter, struct xmit_frame *pxmitframe);
 u32 rtw_tkip_encrypt(struct adapter *padapter, struct xmit_frame *pxmitframe);
 void rtw_wep_encrypt(struct adapter *padapter, struct xmit_frame *pxmitframe);
-u32 rtw_aes_decrypt(struct adapter *padapter, u8  *precvframe);
-u32 rtw_tkip_decrypt(struct adapter *padapter, u8  *precvframe);
-void rtw_wep_decrypt(struct adapter *padapter, u8  *precvframe);
+u32 rtw_aes_decrypt(struct adapter *padapter, struct recv_frame *precvframe);
+u32 rtw_tkip_decrypt(struct adapter *padapter, struct recv_frame *precvframe);
+void rtw_wep_decrypt(struct adapter *padapter, struct recv_frame *precvframe);
 void rtw_use_tkipkey_handler(void *FunctionContext);
 
 #endif	/* __RTL871X_SECURITY_H_ */
-- 
2.32.0


  parent reply	other threads:[~2021-08-29 11:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-29 11:25 [PATCH 0/3] staging: r8188eu: clean up unnecessary type casts Michael Straube
2021-08-29 11:25 ` [PATCH 1/3] staging: r8188eu: convert type of second parameter of rtw_*_encrypt() Michael Straube
2021-08-29 11:25 ` Michael Straube [this message]
2021-08-29 11:25 ` [PATCH 3/3] staging: r8188eu: remove unnecessary type casts Michael Straube
2021-08-30  0:16 ` [PATCH 0/3] staging: r8188eu: clean up " Phillip Potter

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