From: Yijing Wang <wangyijing0307@xxxxxxxxx>
Sometimes, the bus resource start number is not equal to
root bus number. For example, in pci_scan_bus(), we always
add the default bus resource which start bus number is 0,
but the root bus number callers given may != 0, so
we need to update pci_host_bridge bus resource, because we
would check whether host bridge bus resoruce is confict
in later patch.
Signed-off-by: Yijing Wang <wangyijing@xxxxxxxxxx>
---
drivers/pci/host-bridge.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index ecc1a7c..1a9834b 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -26,8 +26,11 @@ static void pci_host_update_busn_res(
struct resource_entry *window;
resource_list_for_each_entry(window, resources)
- if (window->res->flags & IORESOURCE_BUS)
+ if (window->res->flags & IORESOURCE_BUS) {
+ if (bus > window->res->start)
+ window->res->start = bus;
return;
+ }
pr_info(
"No busn resource found for pci%04x:%02x, will use [bus %02x-ff]\n",
--
1.7.1
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