s390/pci: debug device states

Use the debugfs to keep track of a pci function's status changes.

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, 3 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index 7db249a25016..6053e7221b51 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -16,6 +16,7 @@
 #include <linux/pci.h>
 #include <linux/pci_hotplug.h>
 #include <linux/init.h>
+#include <asm/pci_debug.h>
 #include <asm/sclp.h>
 
 #define SLOT_NAME_SIZE  10
@@ -49,6 +50,7 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)
                 return -EIO;
 
         rc = sclp_pci_configure(slot->zdev->fid);
+        zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, rc);
         if (!rc) {
                 slot->zdev->state = ZPCI_FN_STATE_CONFIGURED;
                 /* automatically scan the device after is was configured */
@@ -70,6 +72,7 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
          *       or do we need to trigger that here?
          */
         rc = sclp_pci_deconfigure(slot->zdev->fid);
+        zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, rc);
         if (!rc) {
                 /* Fixme: better call List-PCI to find the disabled FH
                    for the FID since the FH should be opaque... */