linux-kernel - [PATCH] ata: simplify clock divisor logic in pata

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Date:	Tue, 19 Feb 2008 11:26:36 -0800
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, Jeff Garzik <jeff@...zik.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: [PATCH] ata: simplify clock divisor logic in pata_amd.c

Current code is essentially choosing between dividing by 1 or
dividing by two, make the conditions a little more obvious.

As a bonus, removes a sparse error:
drivers/ata/pata_amd.c:59:11: warning: symbol '__x' shadows an earlier one
drivers/ata/pata_amd.c:59:11: originally declared here

Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
Andrew, this is a replacement for:
pata_amd-replace-macro-with-static-inline-in-libatah.patch

It is the same patch, but with a corrected description.

 drivers/ata/pata_amd.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index 4b8d9b5..7ef4847 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -56,7 +56,9 @@ static void timing_setup(struct ata_port *ap, struct ata_device *adev, int offse
 	u8 t;
 
 	T = 1000000000 / amd_clock;
-	UT = T / min_t(int, max_t(int, clock, 1), 2);
+	UT = T;
+	if (clock >= 2)
+		UT = T / 2;
 
 	if (ata_timing_compute(adev, speed, &at, T, UT) < 0) {
 		dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", speed);
-- 
1.5.4.1.1278.gc75be



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