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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2016-03-18 16:55:34 +0200
committerFelipe Balbi <felipe.balbi@linux.intel.com>2016-04-18 15:23:36 +0300
commit5e3bd45f170b43cec3fb85f14ef94f176235c4af (patch)
treec8db8825917e5c0706cfb9272fe2535a7f0bf5ce /drivers/usb/gadget
parentbadf6d47f8a93098c6e05fdeb735b44b61877451 (diff)
downloadlinux-5e3bd45f170b43cec3fb85f14ef94f176235c4af.tar.bz2
usb: gadged: pch_udc: PCI core handles power state for us
There is no need to repeat the work that is already done in the PCI driver core. The patch removes excerpts from suspend and resume callbacks. Note that there is no more calls performed to enable or disable a PCI device during suspend-resume cycle. Nowadays they seems to be superfluous. Someone can read more in [1]. While here, convert PM ops to use modern API. [1] https://www.kernel.org/doc/ols/2009/ols2009-pages-319-330.pdf Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> [felipe.balbi@linux.intel.com: fixed build break and checkpatch error ] Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/udc/pch_udc.c39
1 files changed, 12 insertions, 27 deletions
diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c
index 9571ef54b86b..58fc0adacd79 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -3096,44 +3096,28 @@ static void pch_udc_remove(struct pci_dev *pdev)
kfree(dev);
}
-#ifdef CONFIG_PM
-static int pch_udc_suspend(struct pci_dev *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int pch_udc_suspend(struct device *d)
{
+ struct pci_dev *pdev = to_pci_dev(d);
struct pch_udc_dev *dev = pci_get_drvdata(pdev);
pch_udc_disable_interrupts(dev, UDC_DEVINT_MSK);
pch_udc_disable_ep_interrupts(dev, UDC_EPINT_MSK_DISABLE_ALL);
- pci_disable_device(pdev);
- pci_enable_wake(pdev, PCI_D3hot, 0);
-
- if (pci_save_state(pdev)) {
- dev_err(&pdev->dev,
- "%s: could not save PCI config state\n", __func__);
- return -ENOMEM;
- }
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
-static int pch_udc_resume(struct pci_dev *pdev)
+static int pch_udc_resume(struct device *d)
{
- int ret;
-
- pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
- ret = pci_enable_device(pdev);
- if (ret) {
- dev_err(&pdev->dev, "%s: pci_enable_device failed\n", __func__);
- return ret;
- }
- pci_enable_wake(pdev, PCI_D3hot, 0);
return 0;
}
+
+static SIMPLE_DEV_PM_OPS(pch_udc_pm, pch_udc_suspend, pch_udc_resume);
+#define PCH_UDC_PM_OPS (&pch_udc_pm)
#else
-#define pch_udc_suspend NULL
-#define pch_udc_resume NULL
-#endif /* CONFIG_PM */
+#define PCH_UDC_PM_OPS NULL
+#endif /* CONFIG_PM_SLEEP */
static int pch_udc_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
@@ -3262,9 +3246,10 @@ static struct pci_driver pch_udc_driver = {
.id_table = pch_udc_pcidev_id,
.probe = pch_udc_probe,
.remove = pch_udc_remove,
- .suspend = pch_udc_suspend,
- .resume = pch_udc_resume,
.shutdown = pch_udc_shutdown,
+ .driver = {
+ .pm = PCH_UDC_PM_OPS,
+ },
};
module_pci_driver(pch_udc_driver);