linux-kernel - [PATCH][SCSI] mpt2sas: fix undefined reference to `_

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Date:	Fri, 19 Sep 2014 12:17:27 +0530
From:	Sreekanth Reddy <sreekanth.reddy@...gotech.com>
To:	jejb@...nel.org, hch@...radead.org
Cc:	martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
	JBottomley@...allels.com, Sathya.Prakash@...gotech.com,
	Nagalakshmi.Nandigama@...gotech.com, linux-kernel@...r.kernel.org,
	fengguang.wu@...el.com,
	Sreekanth Reddy <Sreekanth.Reddy@...gotech.com>
Subject: [PATCH][SCSI] mpt2sas: fix undefined reference to `__udivdi3' compilation errors

This patch will fix the below compilation errors on i386 ARCH

drivers/built-in.o: In function `_scsih_qcmd':
mpt2sas_scsih.c:(.text+0x1e7b56): undefined reference to `__udivdi3'
mpt2sas_scsih.c:(.text+0x1e7b8a): undefined reference to `__umoddi3'

Used sector_div() API to fix above compilation errors.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@...gotech.com>
---
 drivers/scsi/mpt2sas/mpt2sas_scsih.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 992a224..c80ed04 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -3860,7 +3860,7 @@ _scsih_setup_direct_io(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
 	struct _raid_device *raid_device, Mpi2SCSIIORequest_t *mpi_request,
 	u16 smid)
 {
-	sector_t v_lba, p_lba, stripe_off, stripe_unit, column, io_size;
+	sector_t v_lba, p_lba, stripe_off, column, io_size;
 	u32 stripe_sz, stripe_exp;
 	u8 num_pds, cmd = scmd->cmnd[0];
 
@@ -3888,9 +3888,9 @@ _scsih_setup_direct_io(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
 
 	num_pds = raid_device->num_pds;
 	p_lba = v_lba >> stripe_exp;
-	stripe_unit = p_lba / num_pds;
-	column = p_lba % num_pds;
-	p_lba = (stripe_unit << stripe_exp) + stripe_off;
+	column = sector_div(p_lba, num_pds);
+	p_lba = (p_lba << stripe_exp) + stripe_off;
+
 	mpi_request->DevHandle = cpu_to_le16(raid_device->pd_handle[column]);
 
 	if (cmd == READ_10 || cmd == WRITE_10)
-- 
2.0.2

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