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linux/drivers/usb/cdns3
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Pawel Laszczak a9aecef198 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.

Cc: stable@vger.kernel.org
Fixes: 3d82904559 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
Signed-off-by: Pawel Laszczak <pawell@cadence.com>

Link: https://lore.kernel.org/r/20210526060527.7197-1-pawell@gli-login.cadence.com
Signed-off-by: Peter Chen <peter.chen@kernel.org>
2021-05-27 09:36:20 +08:00
..
cdns3-debug.h usb: cdns3: Change file names for cdns3 driver. 2020-12-29 12:36:13 +08:00
cdns3-ep0.c usb: cdns3: Fixes for sparse warnings 2020-12-29 12:36:13 +08:00
cdns3-gadget.c usb: cdns3: Enable TDL_CHK only for OUT ep 2021-05-25 08:55:29 +08:00
cdns3-gadget.h usb: cdns3: Optimize DMA request buffer allocation 2021-04-12 20:19:22 +08:00
cdns3-imx.c usb: cdns3: imx: mark cdns_imx_system_resume as __maybe_unused 2021-04-12 20:19:21 +08:00
cdns3-pci-wrap.c usb: cdns3: fix spelling mistake "wrapperr" -> "wrapper" 2020-03-19 15:14:48 +01:00
cdns3-plat.c usb: cdns3: add power lost support for system resume 2021-04-12 20:19:20 +08:00
cdns3-ti.c usb: cdns3: Add support for TI's AM64 SoC 2021-01-23 09:48:56 +08:00
cdns3-trace.c usb: cdns3: Change file names for cdns3 driver. 2020-12-29 12:36:13 +08:00
cdns3-trace.h usb: cdns3: trace: delete the trace parameter for request->trb 2021-04-12 20:19:21 +08:00
cdnsp-debug.h usb: cdnsp: Fixes for sparse warnings 2020-12-29 12:36:13 +08:00
cdnsp-ep0.c usb: cdnsp: Removes some useless trace events 2021-02-06 15:43:52 +08:00
cdnsp-gadget.c usb: cdnsp: Fix lack of removing request from pending list. 2021-05-11 14:15:42 +08:00
cdnsp-gadget.h usb: cdnsp: Fixes issue with Configure Endpoint command 2021-04-12 20:19:23 +08:00
cdnsp-mem.c usb: cdnsp: remove redundant initialization of variable ret 2021-04-12 20:19:22 +08:00
cdnsp-pci.c usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver 2020-12-29 12:36:13 +08:00
cdnsp-ring.c usb: cdnsp: Fix deadlock issue in cdnsp_thread_irq_handler 2021-05-27 09:36:20 +08:00
cdnsp-trace.c usb: cdnsp: Add tracepoints for CDNSP driver 2020-12-29 12:36:13 +08:00
cdnsp-trace.h usb: cdnsp: Removes some useless trace events 2021-02-06 15:43:52 +08:00
core.c usb: cdns3: fix static checker warning. 2021-04-12 20:19:21 +08:00
core.h usb: cdns3: Adds missing __iomem markers 2021-01-14 09:01:33 +08:00
drd.c usb: cdns3: add power lost support for system resume 2021-04-12 20:19:20 +08:00
drd.h usb: cdns3: add power lost support for system resume 2021-04-12 20:19:20 +08:00
gadget-export.h usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver 2020-12-29 12:36:13 +08:00
host-export.h usb: cdns3: Removes xhci_cdns3_suspend_quirk from host-export.h 2020-12-29 12:36:13 +08:00
host.c usb: cdns3: Removes xhci_cdns3_suspend_quirk from host-export.h 2020-12-29 12:36:13 +08:00
Kconfig usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver 2020-12-29 12:36:13 +08:00
Makefile usb: cdnsp: fixes undefined reference to cdns_remove 2021-01-14 09:02:00 +08:00