Patch "usb: cdns3: Put the cdns set active part outside the spin lock" has been added to the 6.5-stable tree

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This is a note to let you know that I've just added the patch titled

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

to the 6.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     usb-cdns3-put-the-cdns-set-active-part-outside-the-s.patch
and it can be found in the queue-6.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 7530cd38b37f333d155564308e174038f9b91e1e
Author: Xiaolei Wang <xiaolei.wang@xxxxxxxxxxxxx>
Date:   Fri Jun 16 10:19:51 2023 +0800

    usb: cdns3: Put the cdns set active part outside the spin lock
    
    [ Upstream commit 2319b9c87fe243327285f2fefd7374ffd75a65fc ]
    
    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>
    Acked-by: Peter Chen <peter.chen@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230616021952.1025854-1-xiaolei.wang@xxxxxxxxxxxxx
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
index 884e2301237f4..1168dbeed2ce0 100644
--- a/drivers/usb/cdns3/cdns3-plat.c
+++ b/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);
diff --git a/drivers/usb/cdns3/cdnsp-pci.c b/drivers/usb/cdns3/cdnsp-pci.c
index 7b151f5af3ccb..0725668ffea4c 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 dbcdf3b24b477..7b20d2d5c262e 100644
--- a/drivers/usb/cdns3/core.c
+++ b/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 <peter.chen@xxxxxxx>");
diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h
index 2d332a788871e..4a4dbc2c15615 100644
--- a/drivers/usb/cdns3/core.h
+++ b/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; }



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