linux-kernel - [PATCH] pci: Allow very large resource windows

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Message-ID: <20140519130255.15364.49358.stgit@alan.etchedpixels.co.uk>
Date:	Mon, 19 May 2014 14:03:14 +0100
From:	Alan <gnomes@...rguk.ukuu.org.uk>
To:	bhelgaas@...gle.com, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] pci: Allow very large resource windows

From: Alan <alan@...ux.intel.com>

This is needed for some of the Xeon Phi type systems.

Signed-off-by: Alan Cox <alan@...ux.intel.com>
---
 drivers/pci/setup-bus.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index d219d44..4184112 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -921,7 +921,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
 {
 	struct pci_dev *dev;
 	resource_size_t min_align, align, size, size0, size1;
-	resource_size_t aligns[12];	/* Alignments from 1Mb to 2Gb */
+	resource_size_t aligns[14];	/* Alignments from 1Mb to 8Gb */
 	int order, max_order;
 	struct resource *b_res = find_free_bus_resource(bus, type);
 	unsigned int mem64_mask = 0;
@@ -960,7 +960,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
 			/* For bridges size != alignment */
 			align = pci_resource_alignment(dev, r);
 			order = __ffs(align) - 20;
-			if (order > 11) {
+			if (order > 13) {
 				dev_warn(&dev->dev, "disabling BAR %d: %pR "
 					 "(bad alignment %#llx)\n", i, r,
 					 (unsigned long long) align);

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