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Subject[PATCH 64/67] hsu: call PCI pm hooks in suspend/resume function
Date
From: Feng Tang <feng.tang@intel.com>

Also add check for dma controller or the uart ports.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/serial/mfd.c | 31 ++++++++++++++++++++++---------
1 files changed, 22 insertions(+), 9 deletions(-)
diff --git a/drivers/serial/mfd.c b/drivers/serial/mfd.c
index f5e7569..bc9af50 100644
--- a/drivers/serial/mfd.c
+++ b/drivers/serial/mfd.c
@@ -1217,25 +1217,38 @@ static struct uart_driver serial_hsu_reg = {
#ifdef CONFIG_PM
static int serial_hsu_suspend(struct pci_dev *pdev, pm_message_t state)
{
+ void *priv = pci_get_drvdata(pdev);
struct uart_hsu_port *up;

- up = pci_get_drvdata(pdev);
- if (!up)
- return 0;
-
- uart_suspend_port(&serial_hsu_reg, &up->port);
+ /* Make sure this is not the internal dma controller */
+ if (priv && (pdev->device != 0x081E)) {
+ up = priv;
+ uart_suspend_port(&serial_hsu_reg, &up->port);
+ }

+ pci_save_state(pdev);
+ pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}

static int serial_hsu_resume(struct pci_dev *pdev)
{
+ void *priv = pci_get_drvdata(pdev);
struct uart_hsu_port *up;
+ int ret;

- up = pci_get_drvdata(pdev);
- if (!up)
- return 0;
- uart_resume_port(&serial_hsu_reg, &up->port);
+ pci_set_power_state(pdev, PCI_D0);
+ pci_restore_state(pdev);
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ dev_warn(&pdev->dev,
+ "HSU: can't re-enable device, try to continue\n");
+
+ if (priv && (pdev->device != 0x081E)) {
+ up = priv;
+ uart_resume_port(&serial_hsu_reg, &up->port);
+ }
return 0;
}
#else
--
1.7.2


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