[U-Boot] [PATCH 06/23] pci: Abort early if bus does not exist

Thierry Reding
2014-08-18T07:16:19Z

From: Thierry Reding <treding@nvidia.com>

When listing the devices on a PCI bus, the current code will blindly try
to access all devices. Internally this causes pci_bus_to_hose() to be
repeatedly called and output an error message every time. Prevent this
by calling pci_bus_to_hose() once and abort early if no bus was found.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
common/cmd_pci.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/common/cmd_pci.c b/common/cmd_pci.c
index a1ba42e2f3a2..5a6048c92604 100644
--- a/common/cmd_pci.c
+++ b/common/cmd_pci.c
@@ -42,12 +42,16 @@ void pci_header_show_brief(pci_dev_t dev);
*/
void pciinfo(int BusNum, int ShortPCIListing)
{
+ struct pci_controller *hose = pci_bus_to_hose(BusNum);
int Device;
int Function;
unsigned char HeaderType;
unsigned short VendorID;
pci_dev_t dev;

+ if (!hose)
+ return;
+
printf("Scanning PCI devices on bus %d\n", BusNum);

if (ShortPCIListing) {
--
2.0.4