Add fixes for known AMD bootup issue

1 files changed, 38 insertions, 0 deletions

diff --git a/0001-x86-PCI-fix-infinity-loop-in-search-for-64bit-BAR-pl.patch b/0001-x86-PCI-fix-infinity-loop-in-search-for-64bit-BAR-pl.patch
new file mode 100644
index 000000000..e846f204a
--- /dev/null
+++ b/0001-x86-PCI-fix-infinity-loop-in-search-for-64bit-BAR-pl.patch
@@ -0,0 +1,38 @@
+From 91990a4f966e1862f9747072c4f46946169e2d8b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
+Date: Tue, 21 Nov 2017 11:20:00 +0100
+Subject: [PATCH 1/3] x86/PCI: fix infinity loop in search for 64bit BAR
+ placement
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Break the loop if we can't find some address space for a 64bit BAR.
+
+Signed-off-by: Christian König <christian.koenig@amd.com>
+---
+ arch/x86/pci/fixup.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
+index e59378bf37d9..e857b3ac5755 100644
+--- a/arch/x86/pci/fixup.c
++++ b/arch/x86/pci/fixup.c
+@@ -695,8 +695,13 @@ static void pci_amd_enable_64bit_bar(struct pci_dev *dev)
+ 	res->end = 0xfd00000000ull - 1;
+ 
+ 	/* Just grab the free area behind system memory for this */
+-	while ((conflict = request_resource_conflict(&iomem_resource, res)))
++	while ((conflict = request_resource_conflict(&iomem_resource, res))) {
++		if (conflict->end >= res->end) {
++			kfree(res);
++			return;
++		}
+ 		res->start = conflict->end + 1;
++	}
+ 
+ 	dev_info(&dev->dev, "adding root bus resource %pR\n", res);
+ 
+-- 
+2.11.0
+