Commit 53dd462a authored Mar 26, 2020 by Pierre Morel Committed by Vasily Gorbik Apr 28, 2020

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>

parent 44510d6f

drivers/pci/hotplug/s390_pci_hpc.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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);
		}

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