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authorPierre Morel <pmorel@linux.ibm.com>2020-03-26 12:07:03 -0400
committerVasily Gorbik <gor@linux.ibm.com>2020-04-28 13:49:47 +0200
commit53dd462ac4dc3fc61ee90ad03d96202e17589156 (patch)
treeb040b53cb1f28c85ec3561ba928a2848d9a76695 /drivers/pci/hotplug
parent44510d6fa0c00aa90b80075caa6b313b25927475 (diff)
s390/pci: Do not disable PF when VFs exist
The Physical function should not be disabled until no virtual functions depends on it. Let's force the user to first use echo 0 > sriov_numfs before allowing to disable the PF with echo 0 > power. Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/pci/hotplug')
-rw-r--r--drivers/pci/hotplug/s390_pci_hpc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index 1579ba895edf..b59f84918fe0 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -91,6 +91,9 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
pdev = pci_get_slot(zbus->bus, zdev->devfn);
if (pdev) {
+ if (pci_num_vf(pdev))
+ return -EBUSY;
+
pci_stop_and_remove_bus_device_locked(pdev);
pci_dev_put(pdev);
}