[bug report] Potential deadlock bug in 'drivers/usb/musb/musb_core.c', between 'musb_g_giveback()' and 'musb_stage0_irq()'

[Ginger]

Dear Linux kernel maintainers,

My research-based static analyzer found a potential deadlock bug
within the 'drivers/usb/musb' subsystem, more specifically, in
'drivers/usb/musb/musb_core.c'.
This deadlock potentially occurs with the involvement of hard irq.

Kernel version: long-term kernel v6.18.9

Potential concurrent triggering executions:
T0:
musb_stage0_irq [t1]
     --> musb_handle_intr_resume
         --> musb_g_resume
             --> spin_lock(&musb->lock); [t2]

T1:
musb_g_giveback
    --> spin_lock(&musb->lock); [t0]

If T0 (i.e., the hard irq) occurs after T1 acquires the lock and both
happen within the same CPU, then T0 will not proceed because it cannot
hold the spin lock that has already been possessed by T1, yet T1
cannot proceed because the hard irq runs disables preempts.
Simply speaking, t0 -> t1 -> t2 can lead to a deadlock.

Thank you for your time and consideration.

Best regards,
Ginger