rt2x00: Wait up to one second on rt2800 for WPDMA to be ready

At least some devices need such a long time to inititalize WPDMA. This
only increases the maximum wait time and shouldn't affect devices that
have been working before.

Reported-by: Joshua Smith <jesmith@kaon.com>
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2800lib.c

@@ -277,13 +277,17 @@ int rt2800_wait_wpdma_ready(struct rt2x00_dev *rt2x00dev)
 	unsigned int i;
 	u32 reg;
 
+	/*
+	 * Some devices are really slow to respond here. Wait a whole second
+	 * before timing out.
+	 */
 	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 		rt2800_register_read(rt2x00dev, WPDMA_GLO_CFG, &reg);
 		if (!rt2x00_get_field32(reg, WPDMA_GLO_CFG_TX_DMA_BUSY) &&
 		    !rt2x00_get_field32(reg, WPDMA_GLO_CFG_RX_DMA_BUSY))
 			return 0;
 
-		msleep(1);
+		msleep(10);
 	}
 
 	ERROR(rt2x00dev, "WPDMA TX/RX busy, aborting.\n");