s390/pci: implement pcibios_release_device

Use pcibios_release_device to implement architecture-specific
functionality when a pci device is released. This function
will be called during pci_release_dev.

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 25 insertions, 1 deletions

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index f1e5be85d592..a56fce445c39 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -565,7 +565,21 @@ static void zpci_map_resources(struct zpci_dev *zdev)
                 pr_debug("BAR%i: -> start: %Lx  end: %Lx\n",
                         i, pdev->resource[i].start, pdev->resource[i].end);
         }
-};
+}
+
+static void zpci_unmap_resources(struct zpci_dev *zdev)
+{
+        struct pci_dev *pdev = zdev->pdev;
+        resource_size_t len;
+        int i;
+
+        for (i = 0; i < PCI_BAR_COUNT; i++) {
+                len = pci_resource_len(pdev, i);
+                if (!len)
+                        continue;
+                pci_iounmap(pdev, (void *) pdev->resource[i].start);
+        }
+}
 
 struct zpci_dev *zpci_alloc_device(void)
 {
@@ -810,6 +824,16 @@ int pcibios_add_device(struct pci_dev *pdev)
         return 0;
 }
 
+void pcibios_release_device(struct pci_dev *pdev)
+{
+        struct zpci_dev *zdev = get_zdev(pdev);
+
+        zpci_unmap_resources(zdev);
+        zpci_fmb_disable_device(zdev);
+        zpci_debug_exit_device(zdev);
+        zdev->pdev = NULL;
+}
+
 static int zpci_scan_bus(struct zpci_dev *zdev)
 {
         struct resource *res;