rt2800usb: add RXINFO_DESC_SIZE definition

Add RXINFO_DESC_SIZE definition and use it instead of abusing
RXD_DESC_SIZE one (TXD_DESC_SIZE and RXD_DESC_SIZE are specific
to PCI version of the chipset).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800usb.c

@@ -2152,7 +2152,7 @@ static void rt2800usb_fill_rxdone(struct queue_entry *entry,
 	 */
 	memcpy(skbdesc->desc, rxd, skbdesc->desc_len);
 	rxd = (__le32 *)skbdesc->desc;
-	rxwi = &rxd[RXD_DESC_SIZE / sizeof(__le32)];
+	rxwi = &rxd[RXINFO_DESC_SIZE / sizeof(__le32)];
 
 	/*
 	 * It is now safe to read the descriptor on all architectures.
@@ -2874,7 +2874,7 @@ static const struct rt2x00lib_ops rt2800usb_rt2x00_ops = {
 static const struct data_queue_desc rt2800usb_queue_rx = {
 	.entry_num		= RX_ENTRIES,
 	.data_size		= AGGREGATION_SIZE,
-	.desc_size		= RXD_DESC_SIZE + RXWI_DESC_SIZE,
+	.desc_size		= RXINFO_DESC_SIZE + RXWI_DESC_SIZE,
 	.priv_size		= sizeof(struct queue_entry_priv_usb),
 };
 

drivers/net/wireless/rt2x00/rt2800usb.h

@@ -1747,7 +1747,8 @@ struct mac_iveiv_entry {
 #define TXD_DESC_SIZE			( 4 * sizeof(__le32) )
 #define TXINFO_DESC_SIZE		( 1 * sizeof(__le32) )
 #define TXWI_DESC_SIZE			( 4 * sizeof(__le32) )
-#define RXD_DESC_SIZE			( 1 * sizeof(__le32) )
+#define RXD_DESC_SIZE			( 4 * sizeof(__le32) )
+#define RXINFO_DESC_SIZE		( 1 * sizeof(__le32) )
 #define RXWI_DESC_SIZE			( 4 * sizeof(__le32) )
 
 /*