diff mbox series

[V3,1/2] crypto: hisilicon/qm - adjust the internal processing sequence of the vf enable and disable

Message ID 20240601025150.1660826-2-huangchenghai2@huawei.com
State Superseded
Headers show
Series crypto: hisilicon - adjust vf configuration sequence and optimize zip reg offset | expand

Commit Message

Chenghai Huang June 1, 2024, 2:51 a.m. UTC 
When the vf is enabled, the value of vfs_num must be assigned
after the VF configuration is complete. Otherwise, the device
may be accessed before the virtual configuration is complete,
causing an error.

When the vf is disabled, clear vfs_num and execute
qm_pm_put_sync before hisi_qm_sriov_disable is return.
Otherwise, if qm_clear_vft_config fails, users may access the
device when the PCI virtualization is disabled, resulting in an
error.

Signed-off-by: Chenghai Huang <huangchenghai2@huawei.com>
---
 drivers/crypto/hisilicon/qm.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 3dac8d8e8568..f614fd228b56 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -3793,14 +3793,13 @@  int hisi_qm_sriov_enable(struct pci_dev *pdev, int max_vfs)
 		goto err_put_sync;
 	}
 
-	qm->vfs_num = num_vfs;
-
 	ret = pci_enable_sriov(pdev, num_vfs);
 	if (ret) {
 		pci_err(pdev, "Can't enable VF!\n");
 		qm_clear_vft_config(qm);
 		goto err_put_sync;
 	}
+	qm->vfs_num = num_vfs;
 
 	pci_info(pdev, "VF enabled, vfs_num(=%d)!\n", num_vfs);
 
@@ -3822,7 +3821,6 @@  EXPORT_SYMBOL_GPL(hisi_qm_sriov_enable);
 int hisi_qm_sriov_disable(struct pci_dev *pdev, bool is_frozen)
 {
 	struct hisi_qm *qm = pci_get_drvdata(pdev);
-	int ret;
 
 	if (pci_vfs_assigned(pdev)) {
 		pci_err(pdev, "Failed to disable VFs as VFs are assigned!\n");
@@ -3837,13 +3835,10 @@  int hisi_qm_sriov_disable(struct pci_dev *pdev, bool is_frozen)
 
 	pci_disable_sriov(pdev);
 
-	ret = qm_clear_vft_config(qm);
-	if (ret)
-		return ret;
-
+	qm->vfs_num = 0;
 	qm_pm_put_sync(qm);
 
-	return 0;
+	return qm_clear_vft_config(qm);
 }
 EXPORT_SYMBOL_GPL(hisi_qm_sriov_disable);