Commit aff68a5a authored by Sebastian Ott's avatar Sebastian Ott Committed by Bjorn Helgaas
Browse files

PCI/IOV: Add flag so platforms can skip VF scanning 



Provide a flag to skip scanning for new VFs after SR-IOV enablement.  This
can be set by implementations for which the VFs are already reported by
other means.

Signed-off-by: default avatarSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 18f9e9d1

drivers/pci/iov.c

+6 −0
Original line number Diff line number Diff line
@@ -257,6 +257,9 @@ static int sriov_add_vfs(struct pci_dev *dev, u16 num_vfs) 
	unsigned int i;

	int rc;



	if (dev->no_vf_scan)

		return 0;



	for (i = 0; i < num_vfs; i++) {

		rc = pci_iov_add_virtfn(dev, i);

		if (rc)
@@ -385,6 +388,9 @@ static void sriov_del_vfs(struct pci_dev *dev) 
	struct pci_sriov *iov = dev->sriov;

	int i;



	if (dev->no_vf_scan)

		return;



	for (i = 0; i < iov->num_VFs; i++)

		pci_iov_remove_virtfn(dev, i);

}

include/linux/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -405,6 +405,7 @@ struct pci_dev { 
	unsigned int	non_compliant_bars:1;	/* Broken BARs; ignore them */

	unsigned int	is_probed:1;		/* Device probing in progress */

	unsigned int	link_active_reporting:1;/* Device capable of reporting link active */

	unsigned int	no_vf_scan:1;		/* Don't scan for VFs after IOV enablement */

	pci_dev_flags_t dev_flags;

	atomic_t	enable_cnt;	/* pci_enable_device has been called */

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