[patch 1/3] brcmfmac: cleanup casts in brcmf_c_mkiovar_bsscfg()

[Dan Carpenter <dan.carpenter@oracle.com>]

Remove some pointless casts from the return value of strlen().  The
"buflen" variable is already an unsigned int so it's never less than
zero and doesn't need to be casted to u32.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_common.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_common.c
index 15c5db5..ae0978c 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_common.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_common.c
@@ -102,11 +102,11 @@ brcmf_c_mkiovar_bsscfg(char *name, char *data, uint datalen,
 	if (bssidx == 0)
 		return brcmf_c_mkiovar(name, data, datalen, buf, buflen);
 
-	prefixlen = (u32) strlen(prefix); /* lengh of bsscfg prefix */
-	namelen = (u32) strlen(name) + 1; /* lengh of iovar  name + null */
+	prefixlen = strlen(prefix); /* lengh of bsscfg prefix */
+	namelen = strlen(name) + 1; /* lengh of iovar name + null */
 	iolen = prefixlen + namelen + sizeof(bssidx_le) + datalen;
 
-	if (buflen < 0 || iolen > (u32)buflen) {
+	if (buflen < iolen) {
 		brcmf_dbg(ERROR, "buffer is too short\n");
 		return 0;
 	}