usb: cdnsp: Fix deadlock issue in cdnsp_thread_irq_handler

In the Linux kernel, the following vulnerability has been resolved:

usb: cdnsp: Fix deadlock issue in cdnsp_thread_irq_handler

Patch fixes the following critical issue caused by deadlock which has been

detected during testing NCM class:

smp: csd: Detected non-responsive CSD lock (#1) on CPU#0

smp: csd: CSD lock (#1) unresponsive.

....

RIP: 0010:native_queued_spin_lock_slowpath+0x61/0x1d0

RSP: 0018:ffffbc494011cde0 EFLAGS: 00000002

RAX: 0000000000000101 RBX: ffff9ee8116b4a68 RCX: 0000000000000000

RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9ee8116b4658

RBP: ffffbc494011cde0 R08: 0000000000000001 R09: 0000000000000000

R10: ffff9ee8116b4670 R11: 0000000000000000 R12: ffff9ee8116b4658

R13: ffff9ee8116b4670 R14: 0000000000000246 R15: ffff9ee8116b4658

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007f7bcc41a830 CR3: 000000007a612003 CR4: 00000000001706e0

Call Trace:

<IRQ>

do_raw_spin_lock+0xc0/0xd0

_raw_spin_lock_irqsave+0x95/0xa0

cdnsp_gadget_ep_queue.cold+0x88/0x107 [cdnsp_udc_pci]

usb_ep_queue+0x35/0x110

eth_start_xmit+0x220/0x3d0 [u_ether]

ncm_tx_timeout+0x34/0x40 [usb_f_ncm]

? ncm_free_inst+0x50/0x50 [usb_f_ncm]

__hrtimer_run_queues+0xac/0x440

hrtimer_run_softirq+0x8c/0xb0

__do_softirq+0xcf/0x428

asm_call_irq_on_stack+0x12/0x20

</IRQ>

do_softirq_own_stack+0x61/0x70

irq_exit_rcu+0xc1/0xd0

sysvec_apic_timer_interrupt+0x52/0xb0

asm_sysvec_apic_timer_interrupt+0x12/0x20

RIP: 0010:do_raw_spin_trylock+0x18/0x40

RSP: 0018:ffffbc494138bda8 EFLAGS: 00000246

RAX: 0000000000000000 RBX: ffff9ee8116b4658 RCX: 0000000000000000

RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9ee8116b4658

RBP: ffffbc494138bda8 R08: 0000000000000001 R09: 0000000000000000

R10: ffff9ee8116b4670 R11: 0000000000000000 R12: ffff9ee8116b4658

R13: ffff9ee8116b4670 R14: ffff9ee7b5c73d80 R15: ffff9ee8116b4000

_raw_spin_lock+0x3d/0x70

? cdnsp_thread_irq_handler.cold+0x32/0x112c [cdnsp_udc_pci]

cdnsp_thread_irq_handler.cold+0x32/0x112c [cdnsp_udc_pci]

? cdnsp_remove_request+0x1f0/0x1f0 [cdnsp_udc_pci]

? cdnsp_thread_irq_handler+0x5/0xa0 [cdnsp_udc_pci]

? irq_thread+0xa0/0x1c0

irq_thread_fn+0x28/0x60

irq_thread+0x105/0x1c0

? __kthread_parkme+0x42/0x90

? irq_forced_thread_fn+0x90/0x90

? wake_threads_waitq+0x30/0x30

? irq_thread_check_affinity+0xe0/0xe0

kthread+0x12a/0x160

? kthread_park+0x90/0x90

ret_from_fork+0x22/0x30

The root cause of issue is spin_lock/spin_unlock instruction instead

spin_lock_irqsave/spin_lock_irqrestore in cdnsp_thread_irq_handler

function.