On 04/14/2016 03:53 PM, Jisheng Zhang wrote:
Last time I checked this I didn't see urgent reason for the move because runtime PM is enabled for PCI devices by default via pci_device_add() -> pci_init_capabilities() -> pci_pm_init() -> pm_runtime_enable().As pointed out by commit 36d48fb5766a ("i2c: designware-platdrv: enable RuntimePM before registering to the core"), "The core may register clients attached to this master which may use funtionality from the master", so enable RuntimePM before registering to the core.Signed-off-by: Jisheng Zhang <[email protected]> --- drivers/i2c/busses/i2c-designware-pcidrv.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c index 7368be0..41a01a7 100644 --- a/drivers/i2c/busses/i2c-designware-pcidrv.c +++ b/drivers/i2c/busses/i2c-designware-pcidrv.c @@ -248,14 +248,17 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev, ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); adap->nr = controller->bus_num; + pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_allow(&pdev->dev); + r = i2c_dw_probe(dev); - if (r) + if (r) { + pm_runtime_forbid(&pdev->dev); return r; + } - pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); - pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_put_autosuspend(&pdev->dev); - pm_runtime_allow(&pdev->dev);
-- Jarkko
