linux-kernel - [PATCH v2] pch_uart: Add MSI support

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Date:	Thu, 23 Jun 2011 09:00:05 +0200
From:	Alexander Stein <alexander.stein@...tec-electronic.com>
To:	Tomoya MORINAGA <tomoya-linux@....okisemi.com>
Cc:	Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexander Stein <alexander.stein@...tec-electronic.com>
Subject: [PATCH v2] pch_uart: Add MSI support

Signed-off-by: Alexander Stein <alexander.stein@...tec-electronic.com>
---
Changes in v2:
* msi_enabled is stored in pci_dev already, skip it in our code

 drivers/tty/serial/pch_uart.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index a3d0c9e..ab34576 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -1578,6 +1578,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
 		goto init_port_hal_free;
 	}
 
+	pci_enable_msi(pdev);
+
 	iobase = pci_resource_start(pdev, 0);
 	mapbase = pci_resource_start(pdev, 1);
 	priv->mapbase = mapbase;
@@ -1640,6 +1642,8 @@ static void pch_uart_pci_remove(struct pci_dev *pdev)
 	struct eg20t_port *priv;
 
 	priv = (struct eg20t_port *)pci_get_drvdata(pdev);
+
+	pci_disable_msi(pdev);
 #ifdef CONFIG_SERIAL_PCH_UART_CONSOLE
 	pch_uart_ports[priv->port.line] = NULL;
 #endif
@@ -1726,6 +1730,7 @@ static int __devinit pch_uart_pci_probe(struct pci_dev *pdev,
 	return ret;
 
 probe_disable_device:
+	pci_disable_msi(pdev);
 	pci_disable_device(pdev);
 probe_error:
 	return ret;
-- 
1.7.3.4

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