usb: cdns3: Put the cdns set active part outside the spin lock

[ Upstream commit 2319b9c ]

The device may be scheduled during the resume process,
so this cannot appear in atomic operations. Since
pm_runtime_set_active will resume suppliers, put set
active outside the spin lock, which is only used to
protect the struct cdns data structure, otherwise the
kernel will report the following warning:

  BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:1163
  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 651, name: sh
  preempt_count: 1, expected: 0
  RCU nest depth: 0, expected: 0
  CPU: 0 PID: 651 Comm: sh Tainted: G        WC         6.1.20 #1
  Hardware name: Freescale i.MX8QM MEK (DT)
  Call trace:
    dump_backtrace.part.0+0xe0/0xf0
    show_stack+0x18/0x30
    dump_stack_lvl+0x64/0x80
    dump_stack+0x1c/0x38
    __might_resched+0x1fc/0x240
    __might_sleep+0x68/0xc0
    __pm_runtime_resume+0x9c/0xe0
    rpm_get_suppliers+0x68/0x1b0
    __pm_runtime_set_status+0x298/0x560
    cdns_resume+0xb0/0x1c0
    cdns3_controller_resume.isra.0+0x1e0/0x250
    cdns3_plat_resume+0x28/0x40

Signed-off-by: Xiaolei Wang <[email protected]>
Acked-by: Peter Chen <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

drivers/usb/cdns3/cdns3-plat.c

@@ -255,9 +255,10 @@ static int cdns3_controller_resume(struct device *dev, pm_message_t msg)
 	cdns3_set_platform_suspend(cdns->dev, false, false);
 
 	spin_lock_irqsave(&cdns->lock, flags);
-	cdns_resume(cdns, !PMSG_IS_AUTO(msg));
+	cdns_resume(cdns);
 	cdns->in_lpm = false;
 	spin_unlock_irqrestore(&cdns->lock, flags);
+	cdns_set_active(cdns, !PMSG_IS_AUTO(msg));
 	if (cdns->wakeup_pending) {
 		cdns->wakeup_pending = false;
 		enable_irq(cdns->wakeup_irq);

drivers/usb/cdns3/cdnsp-pci.c

@@ -208,8 +208,9 @@ static int __maybe_unused cdnsp_pci_resume(struct device *dev)
 	int ret;
 
 	spin_lock_irqsave(&cdns->lock, flags);
-	ret = cdns_resume(cdns, 1);
+	ret = cdns_resume(cdns);
 	spin_unlock_irqrestore(&cdns->lock, flags);
+	cdns_set_active(cdns, 1);
 
 	return ret;
 }

drivers/usb/cdns3/core.c

@@ -522,9 +522,8 @@ int cdns_suspend(struct cdns *cdns)
 }
 EXPORT_SYMBOL_GPL(cdns_suspend);
 
-int cdns_resume(struct cdns *cdns, u8 set_active)
+int cdns_resume(struct cdns *cdns)
 {
-	struct device *dev = cdns->dev;
 	enum usb_role real_role;
 	bool role_changed = false;
 	int ret = 0;
@@ -556,15 +555,23 @@ int cdns_resume(struct cdns *cdns, u8 set_active)
 	if (cdns->roles[cdns->role]->resume)
 		cdns->roles[cdns->role]->resume(cdns, cdns_power_is_lost(cdns));
 
+	return 0;
+}
+EXPORT_SYMBOL_GPL(cdns_resume);
+
+void cdns_set_active(struct cdns *cdns, u8 set_active)
+{
+	struct device *dev = cdns->dev;
+
 	if (set_active) {
 		pm_runtime_disable(dev);
 		pm_runtime_set_active(dev);
 		pm_runtime_enable(dev);
 	}
 
-	return 0;
+	return;
 }
-EXPORT_SYMBOL_GPL(cdns_resume);
+EXPORT_SYMBOL_GPL(cdns_set_active);
 #endif /* CONFIG_PM_SLEEP */
 
 MODULE_AUTHOR("Peter Chen <[email protected]>");

drivers/usb/cdns3/core.h

@@ -125,10 +125,13 @@ int cdns_init(struct cdns *cdns);
 int cdns_remove(struct cdns *cdns);
 
 #ifdef CONFIG_PM_SLEEP
-int cdns_resume(struct cdns *cdns, u8 set_active);
+int cdns_resume(struct cdns *cdns);
 int cdns_suspend(struct cdns *cdns);
+void cdns_set_active(struct cdns *cdns, u8 set_active);
 #else /* CONFIG_PM_SLEEP */
-static inline int cdns_resume(struct cdns *cdns, u8 set_active)
+static inline int cdns_resume(struct cdns *cdns)
+{ return 0; }
+static inline int cdns_set_active(struct cdns *cdns, u8 set_active)
 { return 0; }
 static inline int cdns_suspend(struct cdns *cdns)
 { return 0; }