On 04/14/2016 03:53 PM, Jisheng Zhang wrote:
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 <jszhang@xxxxxxxxxxx>
---
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);
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().
--
Jarkko
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