linux-kernel - [PATCH 11/11] PCI: Treat ROM resource as optional during assigning.

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Date:	Tue, 22 May 2012 23:34:37 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 11/11] PCI: Treat ROM resource as optional during assigning.

So will try to allocate them together with requested ones, if can not assign
them, could go with requested one only, and just skip ROM resource.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 drivers/pci/setup-bus.c |   21 +++++++--------------
 include/linux/pci.h     |    5 +++++
 2 files changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index ed32864..41c08d6 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -305,18 +305,10 @@ static void assign_requested_resources_sorted(struct list_head *head,
 		idx = res - &dev_res->dev->resource[0];
 		if (resource_size(res) &&
 		    pci_assign_resource_fit(dev_res->dev, idx, fit)) {
-			if (fail_head) {
-				/*
-				 * if the failed res is for ROM BAR, and it will
-				 * be enabled later, don't add it to the list
-				 */
-				if (!((idx == PCI_ROM_RESOURCE) &&
-				      (!(res->flags & IORESOURCE_ROM_ENABLE))))
-					add_to_list(fail_head,
-						    dev_res->dev, res,
-						    0 /* dont care */,
-						    0 /* dont care */);
-			}
+			if (fail_head)
+				add_to_list(fail_head, dev_res->dev, res,
+					    0 /* dont care */,
+					    0 /* dont care */);
 			reset_resource(res);
 		}
 	}
@@ -833,8 +825,9 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
 				continue;
 			r_size = resource_size(r);
 
-			/* put SRIOV requested res to the optional list */
-			if (realloc_head && is_pci_iov_resource_idx(i)) {
+			/* put SRIOV/ROM requested res to the optional list */
+			if (realloc_head && (is_pci_iov_resource_idx(i) ||
+					     is_pci_rom_resource_idx(i))) {
 				r->end = r->start - 1;
 				add_to_list(realloc_head, dev, r, r_size, 0/* dont' care */);
 				children_add_size += r_size;
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 0d254d9..08c081c 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -122,6 +122,11 @@ static inline bool is_pci_iov_resource_idx(int i)
 	return false;
 }
 
+static inline bool is_pci_rom_resource_idx(int i)
+{
+	return i == PCI_ROM_RESOURCE;
+}
+
 typedef int __bitwise pci_power_t;
 
 #define PCI_D0		((pci_power_t __force) 0)
-- 
1.7.7

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