From: Selvan Mani <smani@micron.com>
Date: Wed, 7 Nov 2012 13:03:53 +0000 (-0700)
Subject: mtip32xx: Fix to make lba address correct in big-endian systems
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=eda45314922f500f3547d36d317efc05ed823e3e;p=linux.git

mtip32xx: Fix to make lba address correct in big-endian systems

Earlier lba address was assigned directly to lba_low and lba_low_ex,
which would result in a different number (bytes reversed) in
big-endian systems. Now assigning lba address byte-by-byte to fis.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Selvan Mani <smani@micron.com>
Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index dfb7196bbde95..df46b5a3f56fd 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -2465,8 +2465,12 @@ static void mtip_hw_submit_io(struct driver_data *dd, sector_t start,
 	fis->opts        = 1 << 7;
 	fis->command     =
 		(dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE);
-	*((unsigned int *) &fis->lba_low) = (start & 0xFFFFFF);
-	*((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xFFFFFF);
+	fis->lba_low     = start & 0xFF;
+	fis->lba_mid     = (start >> 8) & 0xFF;
+	fis->lba_hi      = (start >> 16) & 0xFF;
+	fis->lba_low_ex  = (start >> 24) & 0xFF;
+	fis->lba_mid_ex  = (start >> 32) & 0xFF;
+	fis->lba_hi_ex   = (start >> 40) & 0xFF;
 	fis->device	 = 1 << 6;
 	fis->features    = nsect & 0xFF;
 	fis->features_ex = (nsect >> 8) & 0xFF;