linux-kernel - [PATCH] tx4939ide: remove wmb()

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Date:	Wed,  1 Apr 2009 01:15:36 +0900
From:	Atsushi Nemoto <anemo@....ocn.ne.jp>
To:	Grant Grundler <grundler@...gle.com>
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-ide@...r.kernel.org, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] tx4939ide: remove wmb()

* define CHECK_DMA_MASK
* remove use of wmb()

Suggested-by: Grant Grundler <grundler@...gle.com>
Signed-off-by: Atsushi Nemoto <anemo@....ocn.ne.jp>
---
This patch is against linux-next 20090331.

 drivers/ide/tx4939ide.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index cc269c0..48186ae 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -327,15 +327,15 @@ static int tx4939ide_dma_end(ide_drive_t *drive)
 	/* read and clear the INTR & ERROR bits */
 	dma_stat = tx4939ide_clear_dma_status(base);
 
-	wmb();
+#define CHECK_DMA_MASK (ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR)
 
 	/* verify good DMA status */
-	if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
+	if ((dma_stat & CHECK_DMA_MASK) == 0 &&
 	    (ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
 	    (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
 		/* INT_IDE lost... bug? */
 		return 0;
-	return ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) !=
+	return ((dma_stat & CHECK_DMA_MASK) !=
 		ATA_DMA_INTR) ? 0x10 | dma_stat : 0;
 }
 
-- 
1.5.6.3

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