On (21/05/14 13:05), Takashi Iwai wrote: > > divide error: 0000 [#1] PREEMPT SMP NOPTI > > RIP: 0010:snd_intel8x0_interrupt+0x121/0x279 > > Code: 42 8b 44 35 34 41 0f af c5 42 03 44 35 38 42 89 44 35 38 48 8b 0c 24 80 b9 60 03 00 00 00 78 0f 49 8d 0c 2e 48 83 c1 38 31 d2 <f7> 71 f4 89 11 42 8b 7c 35 48 44 01 ef 83 e7 1f 42 89 7c 35 48 48 > > RSP: 0000:ffff9a0a80108eb0 EFLAGS: 00010046 > > RAX: 0000000000000000 RBX: 0000000000000019 RCX: ffff90d8c5efc198 > > RDX: 0000000000000000 RSI: ffff9a0a80549016 RDI: ffff9a0a80549024 > > RBP: ffff90d8c5efc060 R08: 000000000000197a R09: 00000f604ed00191 > > R10: 00000000000001e0 R11: ffffffff9468e1d8 R12: 0000000000000020 > > R13: 0000000000000040 R14: 0000000000000100 R15: 0000000000000002 > > FS: 00007a75c397aff8(0000) GS:ffff90d912d80000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00007a77945d1000 CR3: 000000015bf46002 CR4: 0000000000360ea0 > > Call Trace: > > <IRQ> > > __handle_irq_event_percpu+0xa0/0x1c0 > > handle_irq_event_percpu+0x2d/0x70 > > handle_irq_event+0x2c/0x48 > > handle_fasteoi_irq+0xa1/0x161 > > do_IRQ+0x51/0xd6 > > common_interrupt+0xf/0xf > > </IRQ> > > RIP: 0033:0x7a7856462c59 > > Code: 89 ca 48 2b 57 20 48 83 c2 10 31 c0 48 3b 57 28 48 0f 46 c1 c3 cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 00 00 00 00 <b8> f8 02 00 00 48 03 41 08 c3 cc cc cc cc cc cc cc cc cc cc cc cc > > RSP: 002b:00007a75c39794e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffffde > > RAX: 02fa413b24209c6c RBX: 0000017f19e1cf9e RCX: 00007a75c397aff8 > > RDX: 00007a7855792472 RSI: 00007a7855790aa0 RDI: 0000000000000005 > > RBP: 0000000000000005 R08: 0000000000000012 R09: 000000000000000d > > R10: 00000000009f86d2 R11: 000000000000197a R12: 0000017f19e40e7d > > R13: 000005ee937ae557 R14: 00007a7855790aa0 R15: 00007a7855792472 > > Modules linked in: > > ---[ end trace 2ef6d63d0e3d757c ]--- > > RIP: 0010:snd_intel8x0_interrupt+0x121/0x279 > > Code: 42 8b 44 35 34 41 0f af c5 42 03 44 35 38 42 89 44 35 38 48 8b 0c 24 80 b9 60 03 00 00 00 78 0f 49 8d 0c 2e 48 83 c1 38 31 d2 <f7> 71 f4 89 11 42 8b 7c 35 48 44 01 ef 83 e7 1f 42 89 7c 35 48 48 > > RSP: 0000:ffff9a0a80108eb0 EFLAGS: 00010046 > > RAX: 0000000000000000 RBX: 0000000000000019 RCX: ffff90d8c5efc198 > > RDX: 0000000000000000 RSI: ffff9a0a80549016 RDI: ffff9a0a80549024 > > RBP: ffff90d8c5efc060 R08: 000000000000197a R09: 00000f604ed00191 > > R10: 00000000000001e0 R11: ffffffff9468e1d8 R12: 0000000000000020 > > R13: 0000000000000040 R14: 0000000000000100 R15: 0000000000000002 > > FS: 00007a75c397aff8(0000) GS:ffff90d912d80000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00007a77945d1000 CR3: 000000015bf46002 CR4: 0000000000360ea0 > > > > This corresponds to > > > > ichdev->position %= ichdev->size; > > > > in snd_intel8x0_update(). > > > > A print out of that ichdev looks as follows > > > > snd_intel8x0 0000:00:18.0: lvi_frag = 0, frags = 0, size = 0, period_size = 0x0, period_size1 = 0x0 > > This sounds like some spurious IRQ that casually hits during the > resume. It's strange that, even if it's a spurious IRQ, it contains > the proper update bits for the stream. Yes, I found this to be strange as well. That's why I started dumping ichdev fields and so on. > Is that on a real hardware or > on a VM? VM. > In anyway, the patch like below might cover enough. I'll give it a try. > --- a/sound/pci/intel8x0.c > +++ b/sound/pci/intel8x0.c > @@ -691,6 +691,9 @@ static inline void snd_intel8x0_update(struct intel8x0 *chip, struct ichdev *ich > int status, civ, i, step; > int ack = 0; > > + if (!ichdev->substream || ichdev->suspended) > + return; > + > spin_lock_irqsave(&chip->reg_lock, flags); > status = igetbyte(chip, port + ichdev->roff_sr); > civ = igetbyte(chip, port + ICH_REG_OFF_CIV);
