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Message-ID: <lsq.1544392233.964329884@decadent.org.uk>
Date:   Sun, 09 Dec 2018 21:50:33 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Thomas Petazzoni" <thomas.petazzoni@...tlin.com>,
        "Lorenzo Pieralisi" <lorenzo.pieralisi@....com>
Subject: [PATCH 3.16 118/328] PCI: mvebu: Fix I/O space end address
 calculation

3.16.62-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Thomas Petazzoni <thomas.petazzoni@...tlin.com>

commit dfd0309fd7b30a5baffaf47b2fccb88b46d64d69 upstream.

pcie->realio.end should be the address of last byte of the area,
therefore using resource_size() of another resource is not correct, we
must substract 1 to get the address of the last byte.

Fixes: 11be65472a427 ("PCI: mvebu: Adapt to the new device tree layout")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 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
@@ -940,7 +940,7 @@ static int mvebu_pcie_probe(struct platf
 		pcie->realio.start = PCIBIOS_MIN_IO;
 		pcie->realio.end = min_t(resource_size_t,
 					 IO_SPACE_LIMIT,
-					 resource_size(&pcie->io));
+					 resource_size(&pcie->io) - 1);
 	} else
 		pcie->realio = pcie->io;
 

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