Subject: [Bug 213079] [bisected] IRQ problems and crashes on a PowerMac G5 with 5.12.3

From: [email-masked]
Date: Fri, 20 Aug 2021 00:12:24 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=213079

Erhard F. ([email-masked]) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #297473|0                           |1
        is obsolete|                            |

--- Comment #16 from Erhard F. ([email-masked]) ---
Created attachment 298371
  --> https://bugzilla.kernel.org/attachment.cgi?id=298371&action=edit
dmesg (5.14-rc6, PowerMac G5 11,2)

As there is a fix now for bug #213803 I was able to build v5.14-rc6 and gave it
a testride. Looks like the issue persists:

[...]
irq 63: nobody cared (try booting with the "irqpoll" option)
CPU: 0 PID: 10732 Comm: emerge Tainted: G        W        
5.14.0-rc6-PowerMacG5+ #2
Call Trace:
[c00000000fff7af0] [c00000000054de24] .dump_stack_lvl+0x98/0xe0 (unreliable)
[c00000000fff7b80] [c0000000000e1724] .__report_bad_irq+0x34/0xf0
[c00000000fff7c20] [c0000000000e160c] .note_interrupt+0x258/0x300
[c00000000fff7ce0] [c0000000000dd840] .handle_irq_event_percpu+0x5c/0x88
[c00000000fff7d70] [c0000000000dd8b0] .handle_irq_event+0x44/0x70
[c00000000fff7e00] [c0000000000e2d34] .handle_fasteoi_irq+0xac/0x158
[c00000000fff7ea0] [c0000000000dc8bc] .handle_irq_desc+0x34/0x54
[c00000000fff7f10] [c000000000012058] .__do_irq+0x15c/0x238
[c00000000fff7f90] [c000000000012978] .__do_IRQ+0xac/0xb4
[c00000001e9cfcf0] [c00000001e9cfd90] 0xc00000001e9cfd90
[c00000001e9cfd90] [c000000000012ac4] .do_IRQ+0x144/0x194
[c00000001e9cfe10] [c000000000008050]
hardware_interrupt_common_virt+0x210/0x220
--- interrupt: 500 at 0x3fffb9b25d9c
NIP:  00003fffb9b25d9c LR: 00003fffb9b2811c CTR: 00003fffb9b25d9c
REGS: c00000001e9cfe80 TRAP: 0500   Tainted: G        W         
(5.14.0-rc6-PowerMacG5+)
MSR:  900000000000f032 <SF,HV,EE,PR,FP,ME,IR,DR,RI>  CR: 22482822  XER:
20000000
IRQMASK: 0 
GPR00: 00003fffb9b28100 00003ffffd4e7550 00003fffb9ef6200 00003fffb7977790 
GPR04: 00003fffb7977790 00003fffb55e8b80 0000000000000000 00003fffb9eccac0 
GPR08: 00003fffb9b25d9c 0000000000000000 000000000000000f 0000000000000000 
GPR12: 00003fffb9b7eeb0 00003fffb9fc8890 00003ffffd4e7658 00003fffb395c548 
GPR16: 00003ffffd4e7670 ffffffffffffffff 00003fffb7902480 ffffffffffffffff 
GPR20: 0000000000000000 00003fffb395c528 000000014b8f7878 0000000000000000 
GPR24: 00003fffb7969a80 000000014b8f7830 00003fffb7a750d0 000000000000000a 
GPR28: 00003fffb7a750dc 000000000000007c 000000014b8f9420 00003fffb395c3c0 
NIP [00003fffb9b25d9c] 0x3fffb9b25d9c
LR [00003fffb9b2811c] 0x3fffb9b2811c
--- interrupt: 500
handlers:
[<c0000000015a6568>] .nvme_irq
[<c0000000015a6568>] .nvme_irq
Disabling IRQ #63

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