Unverified Commit 4cd5f3a7 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!14791 scsi: ufs: core: sysfs: Prevent div by zero 

Merge Pull Request from: @ci-robot 
 
PR sync from: Heyuan Wang <wangheyuan2@h-partners.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/OVSZMSDRTXZ5B5AIEQ3U2FW3AEXVPEON/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBEAOG 
 
Link:https://gitee.com/openeuler/kernel/pulls/14791

 

Reviewed-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents f4c8a24a efa26234

drivers/ufs/core/ufs-sysfs.c

+6 −0
Original line number Diff line number Diff line
@@ -485,6 +485,9 @@ static ssize_t read_req_latency_avg_show(struct device *dev, 
	struct ufs_hba *hba = dev_get_drvdata(dev);

	struct ufs_hba_monitor *m = &hba->monitor;



	if (!m->nr_req[READ])

		return sysfs_emit(buf, "0\n");



	return sysfs_emit(buf, "%llu\n", div_u64(ktime_to_us(m->lat_sum[READ]),

						 m->nr_req[READ]));

}
@@ -552,6 +555,9 @@ static ssize_t write_req_latency_avg_show(struct device *dev, 
	struct ufs_hba *hba = dev_get_drvdata(dev);

	struct ufs_hba_monitor *m = &hba->monitor;



	if (!m->nr_req[WRITE])

		return sysfs_emit(buf, "0\n");



	return sysfs_emit(buf, "%llu\n", div_u64(ktime_to_us(m->lat_sum[WRITE]),

						 m->nr_req[WRITE]));

}