[PATCH v5 18/23] powerpc/pci: Handle BAR movement

[Sergey Miroshnichenko]

Add pcibios_rescan_prepare()/_done() hooks for the powerpc platform. Now if
the device's driver supports movable BARs, pcibios_rescan_prepare() will be
called after the device is stopped, and pcibios_rescan_done() - before it
resumes. There are no memory requests to this device between the hooks, so
it it safe to rebuild the EEH address cache during that.

CC: Oliver O'Halloran <oohall at gmail.com>
Signed-off-by: Sergey Miroshnichenko <s.miroshnichenko at yadro.com>
---
 arch/powerpc/kernel/pci-hotplug.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/powerpc/kernel/pci-hotplug.c b/arch/powerpc/kernel/pci-hotplug.c
index 0b0cf8168b47..18cf13bba228 100644
--- a/arch/powerpc/kernel/pci-hotplug.c
+++ b/arch/powerpc/kernel/pci-hotplug.c
@@ -144,3 +144,13 @@ void pci_hp_add_devices(struct pci_bus *bus)
 	pcibios_finish_adding_to_bus(bus);
 }
 EXPORT_SYMBOL_GPL(pci_hp_add_devices);
+
+void pcibios_rescan_prepare(struct pci_dev *pdev)
+{
+	eeh_addr_cache_rmv_dev(pdev);
+}
+
+void pcibios_rescan_done(struct pci_dev *pdev)
+{
+	eeh_addr_cache_insert_dev(pdev);
+}
-- 
2.21.0