After Vega 56/64 GPU hang I unable reboot system

[Mikhail Gavrilov]

I see that backtrace in my previous message are borked.
I place backtrace in text file for more comfort reading in this message.


--
Best Regards,
Mike Gavrilov.
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Cannot seek to MMIO address: Bad file descriptor
[ERROR]: Could not open ring debugfs file
Program received signal SIGSEGV, Segmentation fault.
umr_pm4_decode_ring (asic=asic at entry=0x1c08a50, ringname=<optimized out>, no_halt=no_halt at entry=1) at /home/mikhail/packaging-work/umr/src/lib/umr_read_pm4_stream.c:333
333		ringdata[0] %= ringsize;
(gdb) thread apply all bt full

Thread 1 (Thread 0x7ffff7a22740 (LWP 7844)):
#0  umr_pm4_decode_ring (asic=asic at entry=0x1c08a50, ringname=<optimized out>, no_halt=no_halt at entry=1) at /home/mikhail/packaging-work/umr/src/lib/umr_read_pm4_stream.c:333
        ps = <optimized out>
        ringdata = 0x0
        ringsize = 8191
#1  0x00000000004b4ac6 in umr_print_waves (asic=asic at entry=0x1c08a50) at /home/mikhail/packaging-work/umr/src/app/print_waves.c:52
        x = <optimized out>
        y = <optimized out>
        shift = <optimized out>
        thread = <optimized out>
        pgm_addr = <optimized out>
        shader_addr = <optimized out>
        wd = <optimized out>
        owd = <optimized out>
        first = 1
        col = 0
        shader = 0x0
        stream = <optimized out>
#2  0x0000000000496952 in main (argc=<optimized out>, argv=<optimized out>) at /home/mikhail/packaging-work/umr/src/app/main.c:285
        i = 3
        j = <optimized out>
        k = <optimized out>
        l = <optimized out>
        asic = 0x1c08a50
        blockname = <optimized out>
        str = <optimized out>
        str2 = <optimized out>
        asicname = "\000\000\000\000\004", '\000' <repeats 19 times>, "F;\226\000\000\000\000\000\000\000\000\000\004", '\000' <repeats 19 times>, "\a", '\000' <repeats 11 times>, "\004", '\000' <repeats 19 times>, "\027\362\321\000\000\000\000\000\000\000\000\000\004", '\000' <repeats 31 times>, "\004", '\000' <repeats 31 times>, "\004", '\000' <repeats 31 times>, "\004", '\000' <repeats 31 times>...
        ipname = '\000' <repeats 24 times>, "F;\226", '\000' <repeats 29 times>, "l-option", '\000' <repeats 24 times>, "\006\000\000\000\000\000\000\200", '\000' <repeats 56 times>, "\027\362\321", '\000' <repeats 29 times>, "\037", '\000' <repeats 31 times>...
        regname = "\000\000\000\000\000 ", '\000' <repeats 18 times>, "\017\004", '\000' <repeats 11 times>, " ", '\000' <repeats 18 times>, "\220\377\377\377\377\377\377\377", '\000' <repeats 16 times>, "\031", '\000' <repeats 15 times>, "\a\000\000\000\000\000\000\000\037\000\000\000\000\000\000\000\003\000\000\000\000\000\000\000\030\220\275\001\000\000\000\000P\000\000\000\000\000\000\000\220\377\377\377\377\377\377\377\000\000\000\000\000\000\000\000\003\000\000\000w\000\000\000[\000\000\000\060", '\000' <repeats 27 times>, "n\000\000\000|", '\000' <repeats 19 times>...
        req = {tv_sec = 0, tv_nsec = 7310868735956184161}
(gdb)