diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c
index 6675261..cc806d6 100644
--- a/net/mac80211/wep.c
+++ b/net/mac80211/wep.c
@@ -138,9 +138,7 @@
 	*icv = cpu_to_le32(~crc32_le(~0, data, data_len));
 
 	crypto_blkcipher_setkey(tfm, rc4key, klen);
-	sg.page = virt_to_page(data);
-	sg.offset = offset_in_page(data);
-	sg.length = data_len + WEP_ICV_LEN;
+	sg_init_one(&sg, data, data_len + WEP_ICV_LEN);
 	crypto_blkcipher_encrypt(&desc, &sg, &sg, sg.length);
 }
 
@@ -204,9 +202,7 @@
 	__le32 crc;
 
 	crypto_blkcipher_setkey(tfm, rc4key, klen);
-	sg.page = virt_to_page(data);
-	sg.offset = offset_in_page(data);
-	sg.length = data_len + WEP_ICV_LEN;
+	sg_init_one(&sg, data, data_len + WEP_ICV_LEN);
 	crypto_blkcipher_decrypt(&desc, &sg, &sg, sg.length);
 
 	crc = cpu_to_le32(~crc32_le(~0, data, data_len));