linux-kernel - [PATCH 56/64] cmd64x: fix handling of address setup timings

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Date:	Mon, 18 Jan 2010 18:21:41 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 56/64] cmd64x: fix handling of address setup timings

From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Subject: [PATCH] cmd64x: fix handling of address setup timings

Account for the requirements of the DMA mode currently used.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
 drivers/ide/cmd64x.c |   17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

Index: b/drivers/ide/cmd64x.c
===================================================================
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -87,9 +87,6 @@ static void cmd64x_program_timings(ide_d
 	pci_write_config_byte(dev, drwtim_regs[drive->dn],
 			      (t.active << 4) | t.recover);
 
-	if (mode >= XFER_SW_DMA_0)
-		return;
-
 	/*
 	 * The primary channel has individual address setup timing registers
 	 * for each drive and the hardware selects the slowest timing itself.
@@ -99,11 +96,17 @@ static void cmd64x_program_timings(ide_d
 	if (hwif->channel) {
 		ide_drive_t *pair = ide_get_pair_dev(drive);
 
-		ide_set_drivedata(drive, (void *)(unsigned long)t.setup);
+		if (pair) {
+			struct ide_timing tp;
 
-		if (pair)
-			t.setup = max_t(u8, t.setup,
-					(unsigned long)ide_get_drivedata(pair));
+			ide_timing_compute(pair, pair->pio_mode, &tp, T, 0);
+			ide_timing_merge(&t, &tp, &t, IDE_TIMING_SETUP);
+			if (pair->dma_mode) {
+				ide_timing_compute(pair, pair->dma_mode,
+						&tp, T, 0);
+				ide_timing_merge(&tp, &t, &t, IDE_TIMING_SETUP);
+			}
+		}
 	}
 
 	if (t.setup > 5)		/* shouldn't actually happen... */
--
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