On 2022-01-24 1:41 a.m., Rolf Eike Beer wrote:
So much for the moment.
That was yesterday. And now I just got this:
[1274934.746891] Bad Address (null pointer deref?): Code=15 (Data TLB miss fault) at addr 0000004140000018
[1274934.746891] CPU: 3 PID: 5549 Comm: cmake Not tainted 5.15.4-gentoo-parisc64 #4
[1274934.746891] Hardware name: 9000/785/C8000
[1274934.746891]
[1274934.746891] YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
[1274934.746891] PSW: 00001000000001001111111000001110 Not tainted
[1274934.746891] r00-03 000000ff0804fe0e 0000000040bc9bc0 00000000406760e4 0000004140000000
[1274934.746891] r04-07 0000000040b693c0 0000004140000000 000000004a2b08b0 0000000000000001
[1274934.746891] r08-11 0000000041f98810 0000000000000000 000000004a0a7000 0000000000000001
[1274934.746891] r12-15 0000000040bddbc0 0000000040c0cbc0 0000000040bddbc0 0000000040bddbc0
[1274934.746891] r16-19 0000000040bde3c0 0000000040bddbc0 0000000040bde3c0 0000000000000007
[1274934.746891] r20-23 0000000000000006 000000004a368950 0000000000000000 0000000000000001
[1274934.746891] r24-27 0000000000001fff 000000000800000e 000000004a1710f0 0000000040b693c0
[1274934.746891] r28-31 0000000000000001 0000000041f988b0 0000000041f98840 000000004a171118
[1274934.746891] sr00-03 00000000066e5800 0000000000000000 0000000000000000 00000000066e5800
[1274934.746891] sr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[1274934.746891]
[1274934.746891] IASQ: 0000000000000000 0000000000000000 IAOQ: 00000000406760e8 00000000406760ec
[1274934.746891] IIR: 48780030 ISR: 0000000000000000 IOR: 0000004140000018
[1274934.746891] CPU: 3 CR30: 00000040e3a9c000 CR31: ffffffffffffffff
[1274934.746891] ORIG_R28: 0000000040acdd58
[1274934.746891] IAOQ[0]: sba_unmap_sg+0xb0/0x118
[1274934.746891] IAOQ[1]: sba_unmap_sg+0xb4/0x118
[1274934.746891] RP(r2): sba_unmap_sg+0xac/0x118
[1274934.746891] Backtrace:
[1274934.746891] [<00000000402740cc>] dma_unmap_sg_attrs+0x6c/0x70
[1274934.746891] [<000000004074d6bc>] scsi_dma_unmap+0x54/0x60
[1274934.746891] [<00000000407a3488>] mptscsih_io_done+0x150/0xd70
[1274934.746891] [<0000000040798600>] mpt_interrupt+0x168/0xa68
[1274934.746891] [<0000000040255a48>] __handle_irq_event_percpu+0xc8/0x278
[1274934.746891] [<0000000040255c34>] handle_irq_event_percpu+0x3c/0xd8
[1274934.746891] [<000000004025ecb4>] handle_percpu_irq+0xb4/0xf0
[1274934.746891] [<00000000402548e0>] generic_handle_irq+0x50/0x70
[1274934.746891] [<000000004019a254>] call_on_stack+0x18/0x24
Faulting instruction is "ldw 18(r3),r24". Address in $r3 (and $r5) seems bad. Think the sglist argument
to sba_unmap_sg() is bad. Don't have a clue as to why this might be.
There are a number of debug flags in the code in drivers/parisc/sba_iommu.c:
/*
** The number of debug flags is a clue - this code is fragile.
** Don't even think about messing with it unless you have
** plenty of 710's to sacrifice to the computer gods. :^)
*/
Grant was expert in this code.
Dave
--
John David Anglin dave.anglin@xxxxxxxx
