From: Niklas Schnelle schnelle@linux.ibm.com
commit 02368b7cf6c7badefa13741aed7a8b91d9a11b19 upstream.
It's currently safe to call zpci_cleanup_bus_resources() even if the resources were never created but it makes no sense so check zdev->has_resources before we call zpci_cleanup_bus_resources() in zpci_release_device().
Reviewed-by: Matthew Rosato mjrosato@linux.ibm.com Acked-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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/s390/pci/pci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -829,7 +829,8 @@ void zpci_release_device(struct kref *kr case ZPCI_FN_STATE_STANDBY: if (zdev->has_hp_slot) zpci_exit_slot(zdev); - zpci_cleanup_bus_resources(zdev); + if (zdev->has_resources) + zpci_cleanup_bus_resources(zdev); zpci_bus_device_unregister(zdev); zpci_destroy_iommu(zdev); fallthrough;