From 042b83d4c502d17db40f1fa4f6d9b6cb86c653d2 Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Wed, 12 Nov 2014 18:26:48 -0700
Subject: pci: Abort early if bus does not exist

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>
Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/common/cmd_pci.c b/common/cmd_pci.c
index a1ba42e..5a6048c 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) {
-- 
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