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scsi: myrs: fix build failure on 32 bit

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For 32 bit versions we have to be careful about divisions of 64 bit
quantities so use do_div() instead of a direct division.  This fixes a
warning about _uldivmod being undefined in certain configurations

Fixes: 7726618639 ("scsi: myrs: Add Mylex RAID controller")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Bottomley 2018-10-18 16:50:56 -07:00 committed by Martin K. Petersen
parent 4d5b4ac1ea
commit d592dd6400
1 changed files with 4 additions and 3 deletions
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7
drivers/scsi/myrs.c
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@ -1978,7 +1978,8 @@ myrs_get_resync(struct device *dev)
struct scsi_device *sdev = to_scsi_device(dev);
struct myrs_hba *cs = shost_priv(sdev->host);
struct myrs_ldev_info *ldev_info = sdev->hostdata;
u8 percent_complete = 0, status;
u64 percent_complete = 0;
u8 status;
if (sdev->channel < cs->ctlr_info->physchan_present || !ldev_info)
return;
@ -1986,8 +1987,8 @@ myrs_get_resync(struct device *dev)
unsigned short ldev_num = ldev_info->ldev_num;
status = myrs_get_ldev_info(cs, ldev_num, ldev_info);
percent_complete = ldev_info->rbld_lba * 100 /
ldev_info->cfg_devsize;
percent_complete = ldev_info->rbld_lba * 100;
do_div(percent_complete, ldev_info->cfg_devsize);
}
raid_set_resync(myrs_raid_template, dev, percent_complete);
}