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[PATCH] tx493[89]ide: Fix length for __ide_flush_dcache_range

To: linux-ide@vger.kernel.org
Subject: [PATCH] tx493[89]ide: Fix length for __ide_flush_dcache_range
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Thu, 25 Dec 2008 23:32:38 +0900
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>, sshtylyov@ru.mvista.com, linux-mips@linux-mips.org, stable <stable@kernel.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
This fixes data corruption on PIO mode.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: stable <stable@kernel.org>
---
 drivers/ide/tx4938ide.c |    4 ++--
 drivers/ide/tx4939ide.c |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/ide/tx4938ide.c b/drivers/ide/tx4938ide.c
index 9120063..13b63e7 100644
--- a/drivers/ide/tx4938ide.c
+++ b/drivers/ide/tx4938ide.c
@@ -181,7 +181,7 @@ static void tx4938ide_input_data_swap(ide_drive_t *drive, 
struct request *rq,
 
        while (count--)
                *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
-       __ide_flush_dcache_range((unsigned long)buf, count * 2);
+       __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
 }
 
 static void tx4938ide_output_data_swap(ide_drive_t *drive, struct request *rq,
@@ -195,7 +195,7 @@ static void tx4938ide_output_data_swap(ide_drive_t *drive, 
struct request *rq,
                __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
                ptr++;
        }
-       __ide_flush_dcache_range((unsigned long)buf, count * 2);
+       __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
 }
 
 static const struct ide_tp_ops tx4938ide_tp_ops = {
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index 30d0d25..97cd9e0 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -564,7 +564,7 @@ static void tx4939ide_input_data_swap(ide_drive_t *drive, 
struct request *rq,
 
        while (count--)
                *ptr++ = cpu_to_le16(__raw_readw((void __iomem *)port));
-       __ide_flush_dcache_range((unsigned long)buf, count * 2);
+       __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
 }
 
 static void tx4939ide_output_data_swap(ide_drive_t *drive, struct request *rq,
@@ -578,7 +578,7 @@ static void tx4939ide_output_data_swap(ide_drive_t *drive, 
struct request *rq,
                __raw_writew(le16_to_cpu(*ptr), (void __iomem *)port);
                ptr++;
        }
-       __ide_flush_dcache_range((unsigned long)buf, count * 2);
+       __ide_flush_dcache_range((unsigned long)buf, roundup(len, 2));
 }
 
 static const struct ide_tp_ops tx4939ide_tp_ops = {
-- 
1.5.6.3


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