pata_at91: call clk_put() on ata_host_activate() failure

pata_at91_probe() forgets to call clk_put() iff ata_host_activate() fails...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/pata_at91.c b/drivers/ata/pata_at91.c
index 960c725..c6d1409 100644
--- a/drivers/ata/pata_at91.c
+++ b/drivers/ata/pata_at91.c
@@ -414,10 +414,13 @@
 
 	host->private_data = info;
 
-	return ata_host_activate(host, irq ? gpio_to_irq(irq) : 0,
+	ret = ata_host_activate(host, irq ? gpio_to_irq(irq) : 0,
 			irq ? ata_sff_interrupt : NULL,
 			irq_flags, &pata_at91_sht);
 
+	if (!ret)
+		return 0;
+
 err_put:
 	clk_put(info->mck);
 	return ret;