linux-kernel - [PATCH] pch_uart: Fix MSI setting issue

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Message-Id: <1333344982-5130-1-git-send-email-tomoya.rohm@gmail.com>
Date:	Mon,  2 Apr 2012 14:36:22 +0900
From:	Tomoya MORINAGA <tomoya.rohm@...il.com>
To:	Alan Cox <alan@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	qi.wang@...el.com, yong.y.wang@...el.com, joel.clark@...el.com,
	kok.howg.ewe@...el.com, Tomoya MORINAGA <tomoya.rohm@...il.com>,
	Alexander Stein <alexander.stein@...tec-electronic.com>
Subject: [PATCH] pch_uart: Fix MSI setting issue

The following patch (MSI setting) is not enough.


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

    pch_uart: Add MSI support
    
    Signed-off-by: Alexander Stein <alexander.stein@...tec-electronic.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

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

cc: Alexander Stein <alexander.stein@...tec-electronic.com>
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@...il.com>
---
 drivers/tty/serial/pch_uart.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 5928877..ae8f848 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -1586,6 +1586,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
 	}
 
 	pci_enable_msi(pdev);
+	pci_set_master(pdev);
 
 	iobase = pci_resource_start(pdev, 0);
 	mapbase = pci_resource_start(pdev, 1);
-- 
1.7.7.6

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