[patch 11/94] tx493[89]ide: Fix length for __ide_flush_dcache_range

[Greg KH]

2.6.28-stable review patch.  If anyone has any objections, please let us know.

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

From: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>

commit f26f6ceacaaf017a677138cbca7ab076b565ca87 upstream.

This fixes data corruption on PIO mode.

Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>
Cc: sshtylyov@xxxxxxxxxxxxx
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/ide/tx4938ide.c |    4 ++--
 drivers/ide/tx4939ide.c |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/ide/tx4938ide.c
+++ b/drivers/ide/tx4938ide.c
@@ -181,7 +181,7 @@ static void tx4938ide_input_data_swap(id
 
 	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(i
 		__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 = {
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -558,7 +558,7 @@ static void tx4939ide_input_data_swap(id
 
 	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,
@@ -572,7 +572,7 @@ static void tx4939ide_output_data_swap(i
 		__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 = {

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