pata_legacy: correctly mask recovery field for HT6560B

According to the HT6560H datasheet, the recovery timing field is 4-bit wide,
with a value of 0 meaning 16 cycles. Correct obvious thinko in the recovery
field mask.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 35aca7d1a3eb..4fe9d2138d48 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -401,8 +401,7 @@ static void ht6560b_set_piomode(struct ata_port *ap, struct ata_device *adev)
         ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
 
         active = clamp_val(t.active, 2, 15);
-        recover = clamp_val(t.recover, 2, 16);
-        recover &= 0x15;
+        recover = clamp_val(t.recover, 2, 16) & 0x0F;
 
         inb(0x3E6);
         inb(0x3E6);