From: Christian Gmeiner christian.gmeiner@gmail.com
If we use U-Boot as coreboot payload with a generic dts without any ranges specified we fail in pci pre_probe and our pci bus is not usable.
So convert decode_regions(..) into a void function and do the simple error handling there.
Signed-off-by: Christian Gmeiner christian.gmeiner@gmail.com Reviewed-by: Bin Meng bmeng.cn@gmail.com [bmeng: fixed 'u-boot' in the commit message and checkpatch warning] Signed-off-by: Bin Meng bmeng.cn@gmail.com
---
drivers/pci/pci-uclass.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 1cd1e40..de4c71b 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -810,8 +810,8 @@ error: return ret; }
-static int decode_regions(struct pci_controller *hose, ofnode parent_node, - ofnode node) +static void decode_regions(struct pci_controller *hose, ofnode parent_node, + ofnode node) { int pci_addr_cells, addr_cells, size_cells; int cells_per_record; @@ -820,8 +820,11 @@ static int decode_regions(struct pci_controller *hose, ofnode parent_node, int i;
prop = ofnode_get_property(node, "ranges", &len); - if (!prop) - return -EINVAL; + if (!prop) { + debug("%s: Cannot decode regions\n", __func__); + return; + } + pci_addr_cells = ofnode_read_simple_addr_cells(node); addr_cells = ofnode_read_simple_addr_cells(parent_node); size_cells = ofnode_read_simple_size_cells(node); @@ -883,7 +886,7 @@ static int decode_regions(struct pci_controller *hose, ofnode parent_node, bd_t *bd = gd->bd;
if (!bd) - return 0; + return;
for (i = 0; i < CONFIG_NR_DRAM_BANKS; ++i) { if (bd->bi_dram[i].size) { @@ -908,13 +911,12 @@ static int decode_regions(struct pci_controller *hose, ofnode parent_node, base, size, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY); #endif
- return 0; + return; }
static int pci_uclass_pre_probe(struct udevice *bus) { struct pci_controller *hose; - int ret;
debug("%s, bus=%d/%s, parent=%s\n", __func__, bus->seq, bus->name, bus->parent->name); @@ -923,12 +925,7 @@ static int pci_uclass_pre_probe(struct udevice *bus) /* For bridges, use the top-level PCI controller */ if (!device_is_on_pci_bus(bus)) { hose->ctlr = bus; - ret = decode_regions(hose, dev_ofnode(bus->parent), - dev_ofnode(bus)); - if (ret) { - debug("%s: Cannot decode regions\n", __func__); - return ret; - } + decode_regions(hose, dev_ofnode(bus->parent), dev_ofnode(bus)); } else { struct pci_controller *parent_hose;