Unverified Commit 3871a15b authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!2731 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/EXNMBU6KDST6AEQZZKMW627QFKSWL7XE/ 
 
https://gitee.com/openeuler/kernel/issues/I8BLQX 
 
Link:https://gitee.com/openeuler/kernel/pulls/2731

 

Reviewed-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents bb551394 083577ae

drivers/pci/iov.c

+4 −0
Original line number Diff line number Diff line
@@ -16,6 +16,8 @@ 


#define VIRTFN_ID_LEN	16



static DEFINE_MUTEX(pci_sriov_numvfs_lock);



int pci_iov_virtfn_bus(struct pci_dev *dev, int vf_id)

{

	if (!dev->is_physfn)
@@ -313,6 +315,7 @@ 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)
@@ -349,6 +352,7 @@ 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;