wl12xx: allocate buffer the spi busy word from struct wl12xx

Needed for DMA transfers.
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/spi.c

@@ -262,10 +262,11 @@ void wl12xx_spi_read(struct wl12xx *wl, int addr, void *buf,
 {
 	struct spi_transfer t[3];
 	struct spi_message m;
-	char busy_buf[TNETWIF_READ_OFFSET_BYTES];
+	u8 *busy_buf;
 	u32 *cmd;
 
 	cmd = &wl->buffer_cmd;
+	busy_buf = wl->buffer_busyword;
 
 	*cmd = 0;
 	*cmd |= WSPI_CMD_READ;
@@ -281,7 +282,7 @@ void wl12xx_spi_read(struct wl12xx *wl, int addr, void *buf,
 
 	/* Busy and non busy words read */
 	t[1].rx_buf = busy_buf;
-	t[1].len = TNETWIF_READ_OFFSET_BYTES;
+	t[1].len = WL12XX_BUSY_WORD_LEN;
 	spi_message_add_tail(&t[1], &m);
 
 	t[2].rx_buf = buf;

drivers/net/wireless/wl12xx/spi.h

@@ -65,9 +65,8 @@
 
 #define WSPI_INIT_CMD_LEN           8
 
-#define TNETWIF_READ_OFFSET_BYTES  8
 #define HW_ACCESS_WSPI_FIXED_BUSY_LEN \
-		((TNETWIF_READ_OFFSET_BYTES - 4) / sizeof(u32))
+		((WL12XX_BUSY_WORD_LEN - 4) / sizeof(u32))
 #define HW_ACCESS_WSPI_INIT_CMD_MASK  0
 
 

drivers/net/wireless/wl12xx/wl12xx.h

@@ -105,6 +105,7 @@ enum {
 				  CFG_RX_AUTH_EN |  \
 				  CFG_RX_ASSOC_EN)
 
+#define WL12XX_BUSY_WORD_LEN 8
 
 struct boot_attr {
 	u32 radio_type;
@@ -385,6 +386,7 @@ struct wl12xx {
 
 	u32 buffer_32;
 	u32 buffer_cmd;
+	u8 buffer_busyword[WL12XX_BUSY_WORD_LEN];
 };
 
 int wl12xx_plt_start(struct wl12xx *wl);