linux-kernel - Re:[PATCH] staging: rtl8723bs: core: fix some incorrect type warnings

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Message-ID: <AO6AtgBODjnoS0IYaAQ1bKoy.3.1622709415201.Hmail.wanjiabing@vivo.com>
Date:   Thu, 3 Jun 2021 16:36:55 +0800 (GMT+08:00)
From:   Jiabing Wan <wanjiabing@...o.com>
To:     Wan Jiabing <wanjiabing@...o.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Fabio Aiuto <fabioaiuto83@...il.com>,
        Ross Schmidt <ross.schm.dev@...il.com>,
        Qiang Ma <maqianga@...ontech.com>,
        Marco Cesati <marcocesati@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re:[PATCH] staging: rtl8723bs: core: fix some incorrect type warnings

 
 
Hi,all

I fix these warnings by refering other patches.

Actually, I don't understand clearly what I did.  

But there are no warnings after this fix.

So if this fix were totally wrong, please told me and 
gave me some suggestions.

It is important for me to fix a sparse bug.

Thanks,
Jiabing

>Fix some "incorrect type in assignment" in rtw_security.c.
>
>The sparse warings:
>drivers/staging//rtl8723bs/core/rtw_security.c:72:50: warning: incorrect type in assignment
>drivers/staging//rtl8723bs/core/rtw_security.c:72:50:    expected restricted __le32 [usertype]
>drivers/staging//rtl8723bs/core/rtw_security.c:72:50:    got unsigned int
>drivers/staging//rtl8723bs/core/rtw_security.c:80:50: warning: incorrect type in assignment
>drivers/staging//rtl8723bs/core/rtw_security.c:80:50:    expected restricted __le32 [usertype]
>drivers/staging//rtl8723bs/core/rtw_security.c:80:50:    got unsigned int
>drivers/staging//rtl8723bs/core/rtw_security.c:124:33: warning: cast to restricted __le32
>drivers/staging//rtl8723bs/core/rtw_security.c:509:58: warning: incorrect type in assignment
>drivers/staging//rtl8723bs/core/rtw_security.c:509:58:    expected restricted __le32 [usertype]
>drivers/staging//rtl8723bs/core/rtw_security.c:509:58:    got unsigned int
>drivers/staging//rtl8723bs/core/rtw_security.c:517:58: warning: incorrect type in assignment
>drivers/staging//rtl8723bs/core/rtw_security.c:517:58:    expected restricted __le32 [usertype]
>drivers/staging//rtl8723bs/core/rtw_security.c:517:58:    got unsigned int
>drivers/staging//rtl8723bs/core/rtw_security.c:621:41: warning: cast to restricted __le32
>
>Signed-off-by: Wan Jiabing <wanjiabing@...o.com>
>---
> drivers/staging/rtl8723bs/core/rtw_security.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
>diff --git a/drivers/staging/rtl8723bs/core/rtw_security.c b/drivers/staging/rtl8723bs/core/rtw_security.c
>index a99f439..4760999 100644
>--- a/drivers/staging/rtl8723bs/core/rtw_security.c
>+++ b/drivers/staging/rtl8723bs/core/rtw_security.c
>@@ -36,7 +36,7 @@ const char *security_type_str(u8 value)
> void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
> {																	/*  exclude ICV */
> 
>-	unsigned char crc[4];
>+	u8 crc[4];
> 
> 	signed int	curfragnum, length;
> 	u32 keylength;
>@@ -69,7 +69,7 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
> 
> 				length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
> 
>-				*((__le32 *)crc) = ~crc32_le(~0, payload, length);
>+				*((__le32 *)crc) = cpu_to_le32(~crc32_le(~0, payload, length));
> 
> 				arc4_setkey(ctx, wepkey, 3 + keylength);
> 				arc4_crypt(ctx, payload, payload, length);
>@@ -77,7 +77,7 @@ void rtw_wep_encrypt(struct adapter *padapter, u8 *pxmitframe)
> 
> 			} else {
> 				length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
>-				*((__le32 *)crc) = ~crc32_le(~0, payload, length);
>+				*((__le32 *)crc) = cpu_to_le32(~crc32_le(~0, payload, length));
> 				arc4_setkey(ctx, wepkey, 3 + keylength);
> 				arc4_crypt(ctx, payload, payload, length);
> 				arc4_crypt(ctx, payload + length, crc, 4);
>@@ -121,7 +121,7 @@ void rtw_wep_decrypt(struct adapter  *padapter, u8 *precvframe)
> 		arc4_crypt(ctx, payload, payload,  length);
> 
> 		/* calculate icv and compare the icv */
>-		*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
>+		*((__le32 *)crc) = cpu_to_le32(~crc32_le(~0, payload, length - 4));
> 
> 	}
> }
>@@ -506,7 +506,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
> 
> 				if ((curfragnum+1) == pattrib->nr_frags) {	/* 4 the last fragment */
> 					length = pattrib->last_txcmdsz-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
>-					*((__le32 *)crc) = ~crc32_le(~0, payload, length);
>+					*((__le32 *)crc) = cpu_to_le32(~crc32_le(~0, payload, length));
> 
> 					arc4_setkey(ctx, rc4key, 16);
> 					arc4_crypt(ctx, payload, payload, length);
>@@ -514,7 +514,7 @@ u32 rtw_tkip_encrypt(struct adapter *padapter, u8 *pxmitframe)
> 
> 				} else {
> 					length = pxmitpriv->frag_len-pattrib->hdrlen-pattrib->iv_len-pattrib->icv_len;
>-					*((__le32 *)crc) = ~crc32_le(~0, payload, length);
>+					*((__le32 *)crc) = cpu_to_le32(~crc32_le(~0, payload, length));
> 
> 					arc4_setkey(ctx, rc4key, 16);
> 					arc4_crypt(ctx, payload, payload, length);
>@@ -618,7 +618,7 @@ u32 rtw_tkip_decrypt(struct adapter *padapter, u8 *precvframe)
> 			arc4_setkey(ctx, rc4key, 16);
> 			arc4_crypt(ctx, payload, payload, length);
> 
>-			*((u32 *)crc) = le32_to_cpu(~crc32_le(~0, payload, length - 4));
>+			*((__le32 *)crc) = cpu_to_le32(~crc32_le(~0, payload, length - 4));
> 
> 			if (crc[3] != payload[length - 1] || crc[2] != payload[length - 2] ||
> 			    crc[1] != payload[length - 3] || crc[0] != payload[length - 4])
>-- 
>2.7.4
>