From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: [PATCH] scsi: Do not call do_div() with a 64-bit divisor Date: Mon, 4 Nov 2013 10:21:05 +0100 Message-ID: <1383556865-7031-1-git-send-email-geert@linux-m68k.org> Return-path: Sender: linux-kernel-owner@vger.kernel.org To: "James E.J. Bottomley" , Andrew Morton Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven List-Id: linux-scsi@vger.kernel.org do_div() is meant for divisions of 64-bit number by 32-bit numbers. Passing 64-bit divisor types caused issues in the past on 32-bit platforms, cfr. commit ea077b1b96e073eac5c3c5590529e964767fc5f7 ("m68k: Truncate base in do_div()"). As scsi_device.sector_size is unsigned (int), factor should be unsigned int, too. Signed-off-by: Geert Uytterhoeven --- drivers/scsi/sd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 5693f6d7eddb..d6645c70cceb 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1607,7 +1607,7 @@ static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) end_lba <<= 1; } else { /* be careful ... don't want any overflows */ - u64 factor = scmd->device->sector_size / 512; + unsigned int factor = scmd->device->sector_size / 512; do_div(start_lba, factor); do_div(end_lba, factor); } -- 1.7.9.5