mpc83xx: PCIe: Don't start bus enumeration at 0
Currently we assign first_busno = 0 for the first PCIe hose, but this
scheme won't work if we have ordinary PCI hose already registered (its
first_busno value is 0 too).
The old code worked fine only because we have PCI disabled on
MPC837XEMDS boards in stand-alone mode (see commit 00f7bbae92e3b13f2b3
"mpc83xx: fix PCI scan hang on the standalone MPC837xE-MDS boards").
But on MPC837XERDB boards we have PCI and PCIe, so the bug actually
triggers.
So, to fix the issue, we should use pci_last_busno() + 1 for the
first_busno (i.e. last available busno).
Reported-by: Huang Changming <Chang-Ming.Huang@freescale.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/cpu/mpc83xx/pcie.c b/cpu/mpc83xx/pcie.c
index 12b5f69..1a3b2be 100644
--- a/cpu/mpc83xx/pcie.c
+++ b/cpu/mpc83xx/pcie.c
@@ -86,7 +86,6 @@
{
extern void disable_addr_trans(void); /* start.S */
static struct pci_controller pcie_hose[PCIE_MAX_BUSES];
- static int max_bus;
struct pci_controller *hose = &pcie_hose[bus];
int i;
@@ -117,7 +116,7 @@
hose->regions[i].size = 0x100000;
hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_SYS_MEMORY;
- hose->first_busno = max_bus;
+ hose->first_busno = pci_last_busno() + 1;
hose->last_busno = 0xff;
if (bus == 0)
@@ -145,7 +144,6 @@
* Hose scan.
*/
hose->last_busno = pci_hose_scan(hose);
- max_bus = hose->last_busno + 1;
}
#else