>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 <xiaolei.wang@xxxxxxxxxxxxx>
Reviewed-by: Pawel Laszczak <pawell@xxxxxxxxxxx>
>---
> drivers/usb/cdns3/cdns3-plat.c | 3 ++- drivers/usb/cdns3/cdnsp-pci.c | 3
>++-
> drivers/usb/cdns3/core.c | 14 +++++++++++---
> drivers/usb/cdns3/core.h | 3 ++-
> 4 files changed, 17 insertions(+), 6 deletions(-)
>
>diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
>index 2bc5d094548b..726b2e4f67e4 100644
>--- a/drivers/usb/cdns3/cdns3-plat.c
>+++ b/drivers/usb/cdns3/cdns3-plat.c
>@@ -256,9 +256,10 @@ 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);
>diff --git a/drivers/usb/cdns3/cdnsp-pci.c b/drivers/usb/cdns3/cdnsp-pci.c
>index 7b151f5af3cc..0725668ffea4 100644
>--- a/drivers/usb/cdns3/cdnsp-pci.c
>+++ b/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;
> }
>diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c index
>dbcdf3b24b47..661d5597fb68 100644
>--- a/drivers/usb/cdns3/core.c
>+++ b/drivers/usb/cdns3/core.c
>@@ -522,7 +522,7 @@ 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;
>@@ -556,15 +556,23 @@ 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 <peter.chen@xxxxxxx>"); diff --git
>a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h index
>2d332a788871..0f429042f997 100644
>--- a/drivers/usb/cdns3/core.h
>+++ b/drivers/usb/cdns3/core.h
>@@ -125,8 +125,9 @@ 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) { return 0; }
>--
>2.25.1
