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 <seb...@linux.ibm.com>
Reviewed-by: Christoph Hellwig <h...@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
