Commit d874742f authored by Longpeng(Mike)'s avatar Longpeng(Mike) Committed by Greg Kroah-Hartman
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nitro_enclaves: Set Bus Master for the NE PCI device 



Enable Bus Master for the NE PCI device, according to the PCI spec
for submitting memory or I/O requests:

 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

Cc: Andra Paraschiv <andraprs@amazon.com>
Cc: Alexandru Vasile <lexnv@amazon.com>
Cc: Alexandru Ciobotaru <alcioa@amazon.com>
Reviewed-by: default avatarAndra Paraschiv <andraprs@amazon.com>
Signed-off-by: default avatarLongpeng(Mike) <longpeng2@huawei.com>
Link: https://lore.kernel.org/r/20210621004046.1419-1-longpeng2@huawei.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1db37611

drivers/virt/nitro_enclaves/ne_pci_dev.c

+2 −0
Original line number Diff line number Diff line
@@ -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);