commit 867c902e07d5677e2a5b54c0435e589513abde48
author Tomoya MORINAGA <tomoya.rohm@gmail.com> Mon Apr 02 14:36:22 2012 +0900
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Mon Apr 09 10:43:26 2012 -0700
tree c971a2ddbd357d912993b0a12eac2a4282656dd4
parent bc02d15a3452fdf9276e8fb89c5e504a88df888a

pch_uart: Fix MSI setting issue

The following patch (MSI setting) is not enough.

commit e463595fd9c752fa4bf06b47df93ef9ade3c7cf0
Author: Alexander Stein <alexander.stein@systec-electronic.com>
Date:   Mon Jul 4 08:58:31 2011 +0200

    pch_uart: Add MSI support

    Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

To enable MSI mode, PCI bus-mastering must be enabled.
This patch enables the setting.

cc: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/pch_uart.c

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index e825460..afa060f 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -1655,6 +1655,7 @@
 	}
 
 	pci_enable_msi(pdev);
+	pci_set_master(pdev);
 
 	iobase = pci_resource_start(pdev, 0);
 	mapbase = pci_resource_start(pdev, 1);