Unverified Commit 73e3b35e authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!2730 PCI/IOV: Add pci_sriov_numvfs_lock to support enable pci sriov concurrently 

Merge Pull Request from: @ci-robot 
 
PR sync from: Jialin Zhang <zhangjialin11@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/YFXBE5T22ZLVSJAYMG5WCSDQW46MTSSX/ 
 
https://gitee.com/openeuler/kernel/issues/I8BLQX 
 
Link:https://gitee.com/openeuler/kernel/pulls/2730

 

Reviewed-by: default avatarLiu YongQiang <liuyongqiang13@huawei.com>
Reviewed-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
parents ec9639dc 700a05bd

drivers/pci/pci-sysfs.c

+4 −0
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ 


static int sysfs_initialized;	/* = 0 */



static DEFINE_MUTEX(pci_sriov_numvfs_lock);



/* show configuration fields */

#define pci_config_attr(field, format_string)				\

static ssize_t								\
@@ -604,6 +606,7 @@ static ssize_t sriov_numvfs_store(struct device *dev, 
	if (num_vfs > pci_sriov_get_totalvfs(pdev))

		return -ERANGE;



	mutex_lock(&pci_sriov_numvfs_lock);

	device_lock(&pdev->dev);



	if (num_vfs == pdev->sriov->num_VFs)
@@ -640,6 +643,7 @@ static ssize_t sriov_numvfs_store(struct device *dev, 


exit:

	device_unlock(&pdev->dev);

	mutex_unlock(&pci_sriov_numvfs_lock);



	if (ret < 0)

		return ret;