pata_cmd64x: fix PIO setup
Fix incorrect handling of recovery clocks value == 16 resulting
in overclocked recovery timings & potentially underclocked active
timings.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index 0efb1f5..db08c9d 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -2,6 +2,7 @@
* pata_cmd64x.c - CMD64x PATA for new ATA layer
* (C) 2005 Red Hat Inc
* Alan Cox <alan@lxorguk.ukuu.org.uk>
+ * (C) 2009-2010 Bartlomiej Zolnierkiewicz
*
* Based upon
* linux/drivers/ide/pci/cmd64x.c Version 1.30 Sept 10, 2002
@@ -147,7 +148,9 @@
/* Now convert the clocks into values we can actually stuff into
the chip */
- if (t.recover > 1)
+ if (t.recover == 16)
+ t.recover = 0;
+ else if (t.recover > 1)
t.recover--;
else
t.recover = 15;