[U-Boot] [PATCH v3 11/21] pci: sandbox: emul: Fix the call to pci_bus_find_devfn()

[Bin Meng]

With the newly added test cases for PCI configuration access, we get:

  => ut dm pci_busdev
  Test: dm_test_pci_busdev: pci.c
  test/dm/pci.c:49, dm_test_pci_busdev(): SANDBOX_PCI_VENDOR_ID == vendor:
  Expected 4660, got 65535
  Test: dm_test_pci_busdev: pci.c (flat tree)
  test/dm/pci.c:49, dm_test_pci_busdev(): SANDBOX_PCI_VENDOR_ID == vendor:
  Expected 4660, got 65535
  Failures: 2

The bug only shows up when bus number is not equal to zero. This is
caused by the plain find_devfn parameter is passed to function call
pci_bus_find_devfn(), inside which find_devfn is compared to devfn
in the device's pplat structure. However pplat->devfn does not carry
the bus number. Fix this by passing find_devfn with bus number masked.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---

Changes in v3: None
Changes in v2: None

 drivers/pci/pci-emul-uclass.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/pci-emul-uclass.c b/drivers/pci/pci-emul-uclass.c
index 79e2c14..8570a5d 100644
--- a/drivers/pci/pci-emul-uclass.c
+++ b/drivers/pci/pci-emul-uclass.c
@@ -21,7 +21,7 @@ int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
 	struct udevice *dev;
 	int ret;
 
-	ret = pci_bus_find_devfn(bus, find_devfn, &dev);
+	ret = pci_bus_find_devfn(bus, PCI_MASK_BUS(find_devfn), &dev);
 	if (ret) {
 		debug("%s: Could not find emulator for dev %x\n", __func__,
 		      find_devfn);
-- 
2.7.4