[PATCH] nitro_enclaves: set master in the procedure of NE probe

From: Longpeng(Mike)
Date: Mon Jan 18 2021 - 22:33:57 EST


According the PCI spec:
Bus Master Enable – Controls the ability of a PCI Express
Endpoint to issue Memory and I/O Read/Write Requests, and
the ability of a Root or Switch Port to forward Memory and
I/O Read/Write Requests in the Upstream direction

Set BusMaster to make the driver to be PCI conformant.

Signed-off-by: Longpeng(Mike) <longpeng2@xxxxxxxxxx>
---
drivers/virt/nitro_enclaves/ne_pci_dev.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/virt/nitro_enclaves/ne_pci_dev.c b/drivers/virt/nitro_enclaves/ne_pci_dev.c
index b9c1de4..143207e 100644
--- a/drivers/virt/nitro_enclaves/ne_pci_dev.c
+++ b/drivers/virt/nitro_enclaves/ne_pci_dev.c
@@ -480,6 +480,8 @@ static int ne_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto free_ne_pci_dev;
}

+ pci_set_master(pdev);
+
rc = pci_request_regions_exclusive(pdev, "nitro_enclaves");
if (rc < 0) {
dev_err(&pdev->dev, "Error in pci request regions [rc=%d]\n", rc);
--
1.8.3.1