libertas: fixes for slow hardware

Fixes for slow hardware.
Signed-off-by: Vitaly V. Bursov <vitalyvb@ukr.net>
Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/if_cs.c

@@ -148,11 +148,11 @@ static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 r
 {
 	int i;
 
-	for (i = 0; i < 500; i++) {
+	for (i = 0; i < 1000; i++) {
 		u8 val = if_cs_read8(card, addr);
 		if (val == reg)
 			return i;
-		udelay(100);
+		udelay(500);
 	}
 	return -ETIME;
 }
@@ -878,6 +878,9 @@ static int if_cs_probe(struct pcmcia_device *p_dev)
 		goto out3;
 	}
 
+	/* Clear any interrupt cause that happend while sending
+	 * firmware/initializing card */
+	if_cs_write16(card, IF_CS_C_INT_CAUSE, IF_CS_C_IC_MASK);
 	if_cs_enable_ints(card);
 
 	/* And finally bring the card up */