[PATCH] PCI Hotplug ibmphp_pci.c: Fix masking out needed information too early

here is the patch that fixes the bug introduced by my previous patch which
already went into 2.6.12-rc2 and is likely to cause trouble is someone hits
one the else case here by accident.

Using the &= operation before the if statement destroys the information the
if asks for so we always go into the else branch.

Signed-off-by: Rolf Eike Beer <eike-hotplug@sf-tec.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/pci/hotplug/ibmphp_pci.c b/drivers/pci/hotplug/ibmphp_pci.c
index 2335fac65fb4..8122fe734aa7 100644
--- a/drivers/pci/hotplug/ibmphp_pci.c
+++ b/drivers/pci/hotplug/ibmphp_pci.c
@@ -1308,10 +1308,10 @@ static int unconfigure_boot_device (u8 busno, u8 device, u8 function)
                         /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */
                 } else {
                         /* This is Memory */
-                        start_address &= PCI_BASE_ADDRESS_MEM_MASK;
                         if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) {
                                 /* pfmem */
                                 debug ("start address of pfmem is %x\n", start_address);
+                                start_address &= PCI_BASE_ADDRESS_MEM_MASK;
 
                                 if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) {
                                         err ("cannot find corresponding PFMEM resource to remove\n");
@@ -1325,6 +1325,8 @@ static int unconfigure_boot_device (u8 busno, u8 device, u8 function)
                         } else {
                                 /* regular memory */
                                 debug ("start address of mem is %x\n", start_address);
+                                start_address &= PCI_BASE_ADDRESS_MEM_MASK;
+
                                 if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) {
                                         err ("cannot find corresponding MEM resource to remove\n");
                                         return -EIO;
@@ -1422,9 +1424,9 @@ static int unconfigure_boot_bridge (u8 busno, u8 device, u8 function)
                         /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */
                 } else {
                         /* This is Memory */
-                        start_address &= PCI_BASE_ADDRESS_MEM_MASK;
                         if (start_address & PCI_BASE_ADDRESS_MEM_PREFETCH) {
                                 /* pfmem */
+                                start_address &= PCI_BASE_ADDRESS_MEM_MASK;
                                 if (ibmphp_find_resource (bus, start_address, &pfmem, PFMEM) < 0) {
                                         err ("cannot find corresponding PFMEM resource to remove\n");
                                         return -EINVAL;
@@ -1436,6 +1438,7 @@ static int unconfigure_boot_bridge (u8 busno, u8 device, u8 function)
                                 }
                         } else {
                                 /* regular memory */
+                                start_address &= PCI_BASE_ADDRESS_MEM_MASK;
                                 if (ibmphp_find_resource (bus, start_address, &mem, MEM) < 0) {
                                         err ("cannot find corresponding MEM resource to remove\n");
                                         return -EINVAL;