linux-kernel - [ 099/175] pata_legacy: correctly mask recovery field for HT6560B

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Message-Id: <20120330194845.036618607@linuxfoundation.org>
Date:	Fri, 30 Mar 2012 12:50:04 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Sergei Shtylyov <sshtylyov@...mvista.com>,
	Jeff Garzik <jgarzik@...hat.com>
Subject: [ 099/175] pata_legacy: correctly mask recovery field for HT6560B

3.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sergei Shtylyov <sshtylyov@...mvista.com>

commit 9716387311c790de381214c03e7f1b72b91a8189 upstream.

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@...mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/ata/pata_legacy.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -401,8 +401,7 @@ static void ht6560b_set_piomode(struct a
 	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);


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