Stress Test: repetitive unloading and reloading driver causes computer halted on UP^2 and CNL using nocodec topology

[zhuqingliang]

Run soft/kmod_scripts/sof_bootloop.sh cause computer halted on UP^2 and CNL using nocodec topology

description：
In "sof_bootone.sh" , the sleep time is 1 second . After about 2 to 4 cycles ， the system halted and can't resume anymore . Can't get dmesg log since computer already halted .

System Environment:
sof-dev: 6786cd0
sof: d696d8f8bad1490575a8293e0982786300eb52db
soft: a25f4b0b02b51d186d2a9c6d73c8126784a61997
using test-ssp5-mclk-0-I2S-volume-s16le-s16le-48k-24576k-nocodec.tplg

reproduce steps:
./sof_bootloop.sh

log:
boot_0.boot.log
boot_1.boot.log
boot_2.boot.log

[RanderWang]

I tested 3000 cycles on BDW, no such issue

[ZhendanYang]

Latest test with latest code base find out something new:
run 'soft/kmod_scripts/sof_bootloop.sh' on up^2 using test-ssp5-mclk-0-I2S-volume-s16le-s16le-48k-24576k-nocodec.tplg causes no problem.
run 'soft/kmod_scripts/sof_bootloop.sh' on cannonlake using test-ssp5-mclk-0-I2S-volume-s16le-s16le-48k-24000k-nocodec.tplg cause firmware load fail.

dmesg.log:
dmesg.log

[mengdonglin]

stress test on module unload/reload is not priority atm.