[PATCH 2/3] PCI/IOV: provide flag to skip VF scanning
From: Sebastian Ott <hidden>
Date: 2018-12-21 14:18:46
Also in:
linux-pci
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
Provide a flag to skip scanning for new VFs after SRIOV enablement. This can be set by implementations for which the VFs are already reported by other means. Signed-off-by: Sebastian Ott <redacted> Reviewed-by: Christoph Hellwig <hch@lst.de> --- drivers/pci/iov.c | 6 ++++++ include/linux/pci.h | 1 + 2 files changed, 7 insertions(+)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 408db232a328..3aa115ed3a65 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c@@ -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); }
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 11c71c4ecf75..f9bc7651c406 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h@@ -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 */
--
2.13.4