linux-kernel - [PATCH 3.14 063/158] PCI: mvebu: Fix potential issue in range parsing

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Message-Id: <20140504154038.511446734@linuxfoundation.org>
Date:	Sun,  4 May 2014 11:39:32 -0400
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Jean-Jacques Hiblot <jjhiblot@...phandler.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jason Cooper <jason@...edaemon.net>
Subject: [PATCH 3.14 063/158] PCI: mvebu: Fix potential issue in range parsing

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jean-Jacques Hiblot <jjhiblot@...phandler.com>

commit 4f4bde1df33bde076f53325bdf2c6430cf85e1bb upstream.

The second parameter of of_read_number() is not the index, but a size.  As
it happens, in this case it may work just fine because of the conversion to
u32 and the favorable endianness on this architecture.

Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
Tested-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Acked-by: Jason Cooper <jason@...edaemon.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pci/host/pci-mvebu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pci/host/pci-mvebu.c
+++ b/drivers/pci/host/pci-mvebu.c
@@ -797,7 +797,7 @@ static int mvebu_get_tgt_attr(struct dev
 
 	for (i = 0; i < nranges; i++) {
 		u32 flags = of_read_number(range, 1);
-		u32 slot = of_read_number(range, 2);
+		u32 slot = of_read_number(range + 1, 1);
 		u64 cpuaddr = of_read_number(range + na, pna);
 		unsigned long rtype;
 


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