Re: [PATCH 1/4] scsi_debug: fix endianness bug in sdebug_build_parts()

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On 13-07-25 01:10 PM, Martin Peschke wrote:
On Mon, 2013-07-15 at 20:52 +0900, Akinobu Mita wrote:
With module parameter num_parts > 0, partition table is built on the
ramdisk storage when loading the driver.  Unfortunately, there is an
endianness bug in sdebug_build_parts().  So the partition table is not
correctly initialized on big-endian systems.

Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: "James E.J. Bottomley" <JBottomley@xxxxxxxxxxxxx>
Cc: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
---
  drivers/scsi/scsi_debug.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index cb4fefa..2f39b13 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -2659,8 +2659,8 @@ static void __init sdebug_build_parts(unsigned char *ramp,
  			       / sdebug_sectors_per;
  		pp->end_sector = (end_sec % sdebug_sectors_per) + 1;

-		pp->start_sect = start_sec;
-		pp->nr_sects = end_sec - start_sec + 1;
+		pp->start_sect = cpu_to_le32(start_sec);
+		pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
  		pp->sys_ind = 0x83;	/* plain Linux partition */
  	}
  }


I have posted the same fix several times, e.g.
http://marc.info/?l=linux-scsi&m=137051617907423&w=2
Good luck!

Acked-by: Martin Peschke <mpeschke@xxxxxxxxxxxxxxxxxx>

(Re-)Acked-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx>
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