Hello,
with gregkh-usb-usb-ehci-cpufreq-fix.patch removing ehci-hcd causes the
following BUG:
[ 459.800033] BUG: scheduling while atomic: rmmod/0x00000001/4568
[ 459.800045] [<c0104eb3>] dump_trace+0x63/0x1ec
[ 459.800055] [<c0105056>] show_trace_log_lvl+0x1a/0x30
[ 459.800066] [<c0105c82>] show_trace+0x12/0x14
[ 459.800099] [<c0105d0f>] dump_stack+0x16/0x18
[ 459.800135] [<c02eff66>] __sched_text_start+0x56/0x7db
[ 459.800142] [<c02f0768>] wait_for_completion+0x65/0x9b
[ 459.800147] [<c0132c38>] synchronize_rcu+0x2d/0x33
[ 459.800154] [<c0138387>] synchronize_srcu+0x23/0x5f
[ 459.800160] [<c012f6bf>] srcu_notifier_chain_unregister+0x43/0x4d
[ 459.800185] [<c0287b83>] cpufreq_unregister_notifier+0x22/0x32
[ 459.800203] [<f8e85713>] ehci_stop+0x4f/0xb7 [ehci_hcd]
[ 459.800248] [<f8dc48d4>] usb_remove_hcd+0x97/0xd7 [usbcore]
[ 459.800280] [<f8dcdf1d>] usb_hcd_pci_remove+0x18/0x6a [usbcore]
[ 459.800317] [<c01f1ca3>] pci_device_remove+0x1c/0x3d
[ 459.800324] [<c024fc46>] __device_release_driver+0x74/0x90
[ 459.800332] [<c025009f>] driver_detach+0x81/0xc2
[ 459.800337] [<c024f7f9>] bus_remove_driver+0x5d/0x7c
[ 459.800342] [<c025010a>] driver_unregister+0xb/0xd
[ 459.800347] [<c01f1e1d>] pci_unregister_driver+0x13/0x65
[ 459.800351] [<f8e858f8>] ehci_hcd_cleanup+0x10/0x12 [ehci_hcd]
[ 459.800360] [<c0143b11>] sys_delete_module+0x187/0x1ae
[ 459.800367] [<c0103e62>] sysenter_past_esp+0x5f/0x85
[ 459.800373] [<ffffe410>] 0xffffe410
[ 459.800384] =======================
static void ehci_stop (struct usb_hcd *hcd)
{
...
spin_lock_irq(&ehci->lock);
if (HC_IS_RUNNING (hcd->state))
ehci_quiesce (ehci);
#ifdef CONFIG_CPU_FREQ
cpufreq_unregister_notifier(&ehci->cpufreq_transition,
CPUFREQ_TRANSITION_NOTIFIER);
#endif
--
mattia
:wq!
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