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Subject[RFC PATCH] net/wireless/mwifiex/pcie: Convert to dev_pm_ops from legacy pm ops
Date
Convert the driver to use dev_pm_ops for power management and remove Legacy PM
handling. This change re-uses existing suspend and resume interfaces for
dev_pm_ops.

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Cc: Shuah Khan <shuahkhan@gmail.com>
Suggested-by: rafael.j.wysocki@intel.com
---

Rafael,

This is the first driver patch to convert drivers to use dev_pm_ops for
power management. Please review for the approach and make suggestions for
improvement.

thanks,
-- Shuah

drivers/net/wireless/mwifiex/pcie.c | 33 +++++++++++++++++++++++++++------
1 file changed, 27 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c
index 20c9c4c..a271c64 100644
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -85,7 +85,7 @@ static bool mwifiex_pcie_ok_to_access_hw(struct mwifiex_adapter *adapter)
* If already not suspended, this function allocates and sends a host
* sleep activate request to the firmware and turns off the traffic.
*/
-static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __mwifiex_pcie_suspend(struct pci_dev *pdev)
{
struct mwifiex_adapter *adapter;
struct pcie_service_card *card;
@@ -112,6 +112,13 @@ static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state)
return 0;
}

+static int mwifiex_pcie_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ return __mwifiex_pcie_suspend(pdev);
+}
+
/*
* Kernel needs to suspend all functions separately. Therefore all
* registered functions must have drivers with suspend and resume
@@ -120,7 +127,7 @@ static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state)
* If already not resumed, this function turns on the traffic and
* sends a host sleep cancel request to the firmware.
*/
-static int mwifiex_pcie_resume(struct pci_dev *pdev)
+static int __mwifiex_pcie_resume(struct pci_dev *pdev)
{
struct mwifiex_adapter *adapter;
struct pcie_service_card *card;
@@ -150,6 +157,13 @@ static int mwifiex_pcie_resume(struct pci_dev *pdev)

return 0;
}
+
+static int mwifiex_pcie_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ return __mwifiex_pcie_resume(pdev);
+}
#endif

/*
@@ -213,7 +227,7 @@ static void mwifiex_pcie_remove(struct pci_dev *pdev)
if (user_rmmod) {
#ifdef CONFIG_PM
if (adapter->is_suspended)
- mwifiex_pcie_resume(pdev);
+ __mwifiex_pcie_resume(pdev);
#endif

for (i = 0; i < adapter->priv_num; i++)
@@ -249,6 +263,13 @@ static DEFINE_PCI_DEVICE_TABLE(mwifiex_ids) = {

MODULE_DEVICE_TABLE(pci, mwifiex_ids);

+#ifdef CONFIG_PM
+/* Power Management Hooks */
+static const struct dev_pm_ops mwifiex_pcie_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mwifiex_pcie_suspend, mwifiex_pcie_resume)
+};
+#endif
+
/* PCI Device Driver */
static struct pci_driver __refdata mwifiex_pcie = {
.name = "mwifiex_pcie",
@@ -256,9 +277,9 @@ static struct pci_driver __refdata mwifiex_pcie = {
.probe = mwifiex_pcie_probe,
.remove = mwifiex_pcie_remove,
#ifdef CONFIG_PM
- /* Power Management Hooks */
- .suspend = mwifiex_pcie_suspend,
- .resume = mwifiex_pcie_resume,
+ .driver = {
+ .pm = &mwifiex_pcie_pm_ops,
+ },
#endif
};

--
1.7.10.4

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