linux-kernel - [PATCH 3/7] PCI: Don't convert BAR address to resource if dma_addr

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Date:	Tue, 29 Apr 2014 18:59:59 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	linux-pci@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 3/7] PCI: Don't convert BAR address to resource if
 dma_addr_t is too small

If dma_addr_t is too small to represent the BAR value,
pcibios_bus_to_resource() will fail, so just remember the BAR size directly
in the resource.  The resource is already marked UNSET, so we know the
address isn't valid anyway.

Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/pci/probe.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index afae3bf405fa..82cd75f6118a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -258,9 +258,10 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 			pci_write_config_dword(dev, pos, 0);
 			pci_write_config_dword(dev, pos + 4, 0);
 			res->flags |= IORESOURCE_UNSET;
-			region.start = 0;
-			region.end = sz64;
+			res->start = 0;
+			res->end = sz64;
 			bar_disabled = true;
+			goto out;
 		} else {
 			region.start = l64;
 			region.end = l64 + sz64;

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