usb: dwc3: get rid of ->prepare()/->complete()

Using ->prepare()/->complete() to mask/unmask
IRQs is wrong at least for dwc3. We need to
make sure that by the end of ->resume(), IRQs
are working and ready to fire because a child
device may need working IRQs for its own ->resume()
method.

Signed-off-by: Felipe Balbi <balbi@ti.com>

3 files changed, 8 insertions, 73 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 4d4e854f99aa..fa396fc57a85 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -825,50 +825,6 @@ static int dwc3_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM_SLEEP
-static int dwc3_prepare(struct device *dev)
-{
-        struct dwc3     *dwc = dev_get_drvdata(dev);
-        unsigned long   flags;
-
-        spin_lock_irqsave(&dwc->lock, flags);
-
-        switch (dwc->dr_mode) {
-        case USB_DR_MODE_PERIPHERAL:
-        case USB_DR_MODE_OTG:
-                dwc3_gadget_prepare(dwc);
-                /* FALLTHROUGH */
-        case USB_DR_MODE_HOST:
-        default:
-                dwc3_event_buffers_cleanup(dwc);
-                break;
-        }
-
-        spin_unlock_irqrestore(&dwc->lock, flags);
-
-        return 0;
-}
-
-static void dwc3_complete(struct device *dev)
-{
-        struct dwc3     *dwc = dev_get_drvdata(dev);
-        unsigned long   flags;
-
-        spin_lock_irqsave(&dwc->lock, flags);
-
-        dwc3_event_buffers_setup(dwc);
-        switch (dwc->dr_mode) {
-        case USB_DR_MODE_PERIPHERAL:
-        case USB_DR_MODE_OTG:
-                dwc3_gadget_complete(dwc);
-                /* FALLTHROUGH */
-        case USB_DR_MODE_HOST:
-        default:
-                break;
-        }
-
-        spin_unlock_irqrestore(&dwc->lock, flags);
-}
-
 static int dwc3_suspend(struct device *dev)
 {
         struct dwc3     *dwc = dev_get_drvdata(dev);
@@ -883,7 +839,7 @@ static int dwc3_suspend(struct device *dev)
                 /* FALLTHROUGH */
         case USB_DR_MODE_HOST:
         default:
-                /* do nothing */
+                dwc3_event_buffers_cleanup(dwc);
                 break;
         }
 
@@ -916,6 +872,7 @@ static int dwc3_resume(struct device *dev)
 
         spin_lock_irqsave(&dwc->lock, flags);
 
+        dwc3_event_buffers_setup(dwc);
         dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl);
 
         switch (dwc->dr_mode) {
@@ -944,9 +901,6 @@ err_usb2phy_init:
 }
 
 static const struct dev_pm_ops dwc3_dev_pm_ops = {
-        .prepare        = dwc3_prepare,
-        .complete       = dwc3_complete,
-
         SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
 };
 
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 66f62563bcf9..a715ee1f3c06 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -964,20 +964,9 @@ static inline int dwc3_send_gadget_generic_command(struct dwc3 *dwc,
 
 /* power management interface */
 #if !IS_ENABLED(CONFIG_USB_DWC3_HOST)
-int dwc3_gadget_prepare(struct dwc3 *dwc);
-void dwc3_gadget_complete(struct dwc3 *dwc);
 int dwc3_gadget_suspend(struct dwc3 *dwc);
 int dwc3_gadget_resume(struct dwc3 *dwc);
 #else
-static inline int dwc3_gadget_prepare(struct dwc3 *dwc)
-{
-        return 0;
-}
-
-static inline void dwc3_gadget_complete(struct dwc3 *dwc)
-{
-}
-
 static inline int dwc3_gadget_suspend(struct dwc3 *dwc)
 {
         return 0;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 546ea5431b8c..748b87b3f98a 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2744,26 +2744,13 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
                         dwc->ctrl_req, dwc->ctrl_req_addr);
 }
 
-int dwc3_gadget_prepare(struct dwc3 *dwc)
+int dwc3_gadget_suspend(struct dwc3 *dwc)
 {
         if (dwc->pullups_connected) {
                 dwc3_gadget_disable_irq(dwc);
                 dwc3_gadget_run_stop(dwc, true, true);
         }
 
-        return 0;
-}
-
-void dwc3_gadget_complete(struct dwc3 *dwc)
-{
-        if (dwc->pullups_connected) {
-                dwc3_gadget_enable_irq(dwc);
-                dwc3_gadget_run_stop(dwc, true, false);
-        }
-}
-
-int dwc3_gadget_suspend(struct dwc3 *dwc)
-{
         __dwc3_gadget_ep_disable(dwc->eps[0]);
         __dwc3_gadget_ep_disable(dwc->eps[1]);
 
@@ -2798,6 +2785,11 @@ int dwc3_gadget_resume(struct dwc3 *dwc)
 
         dwc3_writel(dwc->regs, DWC3_DCFG, dwc->dcfg);
 
+        if (dwc->pullups_connected) {
+                dwc3_gadget_enable_irq(dwc);
+                dwc3_gadget_run_stop(dwc, true, false);
+        }
+
         return 0;
 
 err1: