On Fri, 24 Apr 2020, Qais Yousef wrote: > The following warning was observed when attempting to suspend to disk > using a USB flash as a swap device. > > [ 111.779649] ------------[ cut here ]------------ > [ 111.788382] URB (____ptrval____) submitted while active > [ 111.796646] WARNING: CPU: 3 PID: 365 at drivers/usb/core/urb.c:363 usb_submit_urb+0x3d8/0x590 > [ 111.805417] Modules linked in: > [ 111.808584] CPU: 3 PID: 365 Comm: kworker/3:2 Not tainted 5.6.0-rc6-00002-gdfd1731f9a3e-dirty #545 > [ 111.817796] Hardware name: ARM Juno development board (r2) (DT) > [ 111.823896] Workqueue: usb_hub_wq hub_event > [ 111.828217] pstate: 60000005 (nZCv daif -PAN -UAO) > [ 111.833156] pc : usb_submit_urb+0x3d8/0x590 > [ 111.837471] lr : usb_submit_urb+0x3d8/0x590 > [ 111.841783] sp : ffff800018de38b0 > [ 111.845205] x29: ffff800018de38b0 x28: 0000000000000003 > [ 111.850682] x27: ffff000970530b20 x26: ffff8000133fd000 > [ 111.856159] x25: ffff8000133fd000 x24: ffff800018de3b38 > [ 111.861635] x23: 0000000000000004 x22: 0000000000000c00 > [ 111.867112] x21: 0000000000000000 x20: 00000000fffffff0 > [ 111.872589] x19: ffff0009704e7a00 x18: ffffffffffffffff > [ 111.878065] x17: 00000000a7c8f4bc x16: 000000002af33de8 > [ 111.883542] x15: ffff8000133fda88 x14: 0720072007200720 > [ 111.889019] x13: 0720072007200720 x12: 0720072007200720 > [ 111.894496] x11: 0000000000000000 x10: 00000000a5286134 > [ 111.899973] x9 : 0000000000000002 x8 : ffff000970c837a0 > [ 111.905449] x7 : 0000000000000000 x6 : ffff800018de3570 > [ 111.910926] x5 : 0000000000000001 x4 : 0000000000000003 > [ 111.916401] x3 : 0000000000000000 x2 : ffff800013427118 > [ 111.921879] x1 : 9d4e965b4b7d7c00 x0 : 0000000000000000 > [ 111.927356] Call trace: > [ 111.929892] usb_submit_urb+0x3d8/0x590 > [ 111.933852] hub_activate+0x108/0x7f0 > [ 111.937633] hub_resume+0xac/0x148 > [ 111.941149] usb_resume_interface.isra.10+0x60/0x138 > [ 111.946265] usb_resume_both+0xe4/0x140 > [ 111.950225] usb_runtime_resume+0x24/0x30 > [ 111.954365] __rpm_callback+0xdc/0x138 > [ 111.958236] rpm_callback+0x34/0x98 > [ 111.961841] rpm_resume+0x4a8/0x720 > [ 111.965445] rpm_resume+0x50c/0x720 > [ 111.969049] __pm_runtime_resume+0x4c/0xb8 > [ 111.973276] usb_autopm_get_interface+0x28/0x60 > [ 111.977948] hub_event+0x80/0x16d8 > [ 111.981466] process_one_work+0x2a4/0x748 > [ 111.985604] worker_thread+0x48/0x498 > [ 111.989387] kthread+0x13c/0x140 > [ 111.992725] ret_from_fork+0x10/0x18 > [ 111.996415] irq event stamp: 354 > [ 111.999756] hardirqs last enabled at (353): [<ffff80001019ea1c>] console_unlock+0x504/0x5b8 > [ 112.008441] hardirqs last disabled at (354): [<ffff8000100a95d0>] do_debug_exception+0x1a8/0x258 > [ 112.017479] softirqs last enabled at (350): [<ffff8000100818a4>] __do_softirq+0x4bc/0x568 > [ 112.025984] softirqs last disabled at (343): [<ffff8000101145a4>] irq_exit+0x144/0x150 > [ 112.034129] ---[ end trace dc96030b9cf6c8a3 ]--- > > The problem was tracked down to a missing call to > pm_runtime_set_active() on resume in ohci-platform. > > Link: https://lore.kernel.org/lkml/20200323143857.db5zphxhq4hz3hmd@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ > Signed-off-by: Qais Yousef <qais.yousef@xxxxxxx> > CC: Tony Prisk <linux@xxxxxxxxxxxxxxx> > CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > CC: Mathias Nyman <mathias.nyman@xxxxxxxxx> > CC: Oliver Neukum <oneukum@xxxxxxx> > CC: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > CC: linux-usb@xxxxxxxxxxxxxxx > CC: linux-kernel@xxxxxxxxxxxxxxx > --- > drivers/usb/host/ohci-platform.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c > index 7addfc2cbadc..4a8456f12a73 100644 > --- a/drivers/usb/host/ohci-platform.c > +++ b/drivers/usb/host/ohci-platform.c > @@ -299,6 +299,11 @@ static int ohci_platform_resume(struct device *dev) > } > > ohci_resume(hcd, false); > + > + pm_runtime_disable(dev); > + pm_runtime_set_active(dev); > + pm_runtime_enable(dev); > + > return 0; > } > #endif /* CONFIG_PM_SLEEP */ For both this patch and the 3/3 patch (ehci-platform): Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Alan Stern
