From 3c4108c82f7769fcd265dc77a5bb0c6d8bcea25f Mon Sep 17 00:00:00 2001 From: Feng Tang Date: Tue, 27 Jul 2010 08:20:52 +0100 Subject: [PATCH] hsu: call PCI pm hooks in suspend/resume function Also add check for dma controller or the uart ports. Signed-off-by: Feng Tang Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/serial/mfd.c | 31 ++++++++++++++++++++++--------- 1 file 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 -- 2.7.4