On (25/06/12 17:45), Sergey Senozhatsky wrote: > In a number of cases we see kernel panics on resume due > to ath11k kernel page fault, which happens under the > following circumstances: > > 1) First ath11k_hal_dump_srng_stats() call > > Last interrupt received for each group: > ath11k_pci 0000:01:00.0: group_id 0 22511ms before > ath11k_pci 0000:01:00.0: group_id 1 14440788ms before > [..] > ath11k_pci 0000:01:00.0: failed to receive control response completion, polling.. > ath11k_pci 0000:01:00.0: Service connect timeout > ath11k_pci 0000:01:00.0: failed to connect to HTT: -110 > ath11k_pci 0000:01:00.0: failed to start core: -110 > ath11k_pci 0000:01:00.0: firmware crashed: MHI_CB_EE_RDDM > ath11k_pci 0000:01:00.0: already resetting count 2 > ath11k_pci 0000:01:00.0: failed to wait wlan mode request (mode 4): -110 > ath11k_pci 0000:01:00.0: qmi failed to send wlan mode off: -110 > ath11k_pci 0000:01:00.0: failed to reconfigure driver on crash recovery > [..] > > 2) At this point reconfiguration fails (we have 2 resets) and > ath11k_core_reconfigure_on_crash() calls ath11k_hal_srng_deinit() > which destroys srng lists. However, it does not reset per-list > ->initialized flag. > > 3) Second ath11k_hal_dump_srng_stats() call sees stale ->initialized > flag and attempts to dump srng stats: > > Last interrupt received for each group: > ath11k_pci 0000:01:00.0: group_id 0 66785ms before > ath11k_pci 0000:01:00.0: group_id 1 14485062ms before > ath11k_pci 0000:01:00.0: group_id 2 14485062ms before > ath11k_pci 0000:01:00.0: group_id 3 14485062ms before > ath11k_pci 0000:01:00.0: group_id 4 14780845ms before > ath11k_pci 0000:01:00.0: group_id 5 14780845ms before > ath11k_pci 0000:01:00.0: group_id 6 14485062ms before > ath11k_pci 0000:01:00.0: group_id 7 66814ms before > ath11k_pci 0000:01:00.0: group_id 8 68997ms before > ath11k_pci 0000:01:00.0: group_id 9 67588ms before > ath11k_pci 0000:01:00.0: group_id 10 69511ms before > BUG: unable to handle page fault for address: ffffa007404eb010 > #PF: supervisor read access in kernel mode > #PF: error_code(0x0000) - not-present page > PGD 100000067 P4D 100000067 PUD 10022d067 PMD 100b01067 PTE 0 > Oops: 0000 [#1] PREEMPT SMP NOPTI > RIP: 0010:ath11k_hal_dump_srng_stats+0x2b4/0x3b0 [ath11k] > Call Trace: > <TASK> > ? __die_body+0xae/0xb0 > ? page_fault_oops+0x381/0x3e0 > ? exc_page_fault+0x69/0xa0 > ? asm_exc_page_fault+0x22/0x30 > ? ath11k_hal_dump_srng_stats+0x2b4/0x3b0 [ath11k (HASH:6cea 4)] > ath11k_qmi_driver_event_work+0xbd/0x1050 [ath11k (HASH:6cea 4)] > worker_thread+0x389/0x930 > kthread+0x149/0x170 > > Clear per-list ->initialized flag in ath11k_hal_srng_deinit(). If you are with this, can you please pick it up?
