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s390/pci: re-introduce zpci_remove_device()

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For fixing the PF to VF link removal we need to perform some action on
every removal of a zdev from the common PCI subsystem.
So in preparation re-introduce zpci_remove_device() and use that instead
of directly calling the common code functions. This  was actually still
declared from earlier code but no longer implemented.

Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Niklas Schnelle 2020-08-03 17:46:32 +02:00 committed by Heiko Carstens
parent 3cddb79afc
commit 2f0230b2f2
3 changed files with 19 additions and 16 deletions
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19
arch/s390/pci/pci.c
View File

@ -672,6 +672,16 @@ int zpci_disable_device(struct zpci_dev *zdev)
}
EXPORT_SYMBOL_GPL(zpci_disable_device);
void zpci_remove_device(struct zpci_dev *zdev)
{
struct zpci_bus *zbus = zdev->zbus;
struct pci_dev *pdev;
pdev = pci_get_slot(zbus->bus, zdev->devfn);
if (pdev)
pci_stop_and_remove_bus_device_locked(pdev);
}
int zpci_create_device(struct zpci_dev *zdev)
{
int rc;
@ -716,13 +726,8 @@ void zpci_release_device(struct kref *kref)
{
struct zpci_dev *zdev = container_of(kref, struct zpci_dev, kref);
if (zdev->zbus->bus) {
struct pci_dev *pdev;
pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
if (pdev)
pci_stop_and_remove_bus_device_locked(pdev);
}
if (zdev->zbus->bus)
zpci_remove_device(zdev);
switch (zdev->state) {
case ZPCI_FN_STATE_ONLINE:

4
arch/s390/pci/pci_event.c
View File

@ -121,7 +121,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
if (!zdev)
break;
if (pdev)
pci_stop_and_remove_bus_device_locked(pdev);
zpci_remove_device(zdev);
ret = zpci_disable_device(zdev);
if (ret)
@ -140,7 +140,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
/* Give the driver a hint that the function is
* already unusable. */
pdev->error_state = pci_channel_io_perm_failure;
pci_stop_and_remove_bus_device_locked(pdev);
zpci_remove_device(zdev);
}
zdev->state = ZPCI_FN_STATE_STANDBY;

12
drivers/pci/hotplug/s390_pci_hpc.c
View File

@ -83,21 +83,19 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
hotplug_slot);
struct pci_dev *pdev;
struct zpci_bus *zbus = zdev->zbus;
int rc;
if (!zpci_fn_configured(zdev->state))
return -EIO;
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);
pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
if (pdev && pci_num_vf(pdev)) {
pci_dev_put(pdev);
return -EBUSY;
}
zpci_remove_device(zdev);
rc = zpci_disable_device(zdev);
if (rc)
return rc;