s390/pci: return error after failed pci ops
Access to pci config space via pci_ops should not fail silently.
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>
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 51d16f1..6a054bf 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -405,20 +405,28 @@
int size, u32 *val)
{
struct zpci_dev *zdev = get_zdev_by_bus(bus);
+ int ret;
if (!zdev || devfn != ZPCI_DEVFN)
- return 0;
- return zpci_cfg_load(zdev, where, val, size);
+ ret = -ENODEV;
+ else
+ ret = zpci_cfg_load(zdev, where, val, size);
+
+ return ret;
}
static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 val)
{
struct zpci_dev *zdev = get_zdev_by_bus(bus);
+ int ret;
if (!zdev || devfn != ZPCI_DEVFN)
- return 0;
- return zpci_cfg_store(zdev, where, val, size);
+ ret = -ENODEV;
+ else
+ ret = zpci_cfg_store(zdev, where, val, size);
+
+ return ret;
}
static struct pci_ops pci_root_ops = {