Comment 2 for bug 1936771

[ 8343.152017] hisi_dma 0000:7b:00.0: dma_sync_wait: timeout!
[ 8343.157493] Kernel panic - not syncing: async_tx_quiesce: DMA error waiting for transaction
[ 8343.165807] CPU: 29 PID: 19770 Comm: md5_raid5 Not tainted 5.8.0-41-generic #46~20.04.1-Ubuntu
[ 8343.174378] Hardware name: Huawei TaiShan 200 (Model 2280)/BC82AMDD, BIOS 2280-V2 CS V5.B143.01 04/22/2021
[ 8343.183985] Call trace:
[ 8343.186429] dump_backtrace+0x0/0x200
[ 8343.190075] show_stack+0x20/0x30
[ 8343.193380] dump_stack+0xc0/0x118
[ 8343.196770] panic+0x150/0x36c
[ 8343.199815] async_tx_submit+0x0/0x400 [async_tx]
[ 8343.204497] async_trigger_callback+0x94/0x15c [async_tx]
[ 8343.209881] raid_run_ops+0x8ec/0x1190 [raid456]
[ 8343.214479] handle_stripe+0x7b4/0x1050 [raid456]
[ 8343.219163] handle_active_stripes.isra.0+0x3d8/0x530 [raid456]
[ 8343.225056] raid5d+0x358/0x6a8 [raid456]
[ 8343.229054] md_thread+0xac/0x1a0
[ 8343.232358] kthread+0xf4/0x120
[ 8343.235489] ret_from_fork+0x10/0x18
[ 8343.239170] SMP: stopping secondary CPUs
[ 8343.243128] Kernel Offset: 0x5335c0680000 from 0xffff800010000000
[ 8343.249190] PHYS_OFFSET: 0xffffd31280000000
[ 8343.253354] CPU features: 0x040002,22a08a38
[ 8343.257518] Memory Limit: none
[ 8343.260673] ---[ end Kernel panic - not syncing: async_tx_quiesce: DMA error waiting for transaction ]---

if setting soft raid ，this sys will cause aboving call trace. Pls disable hisi_dma function.