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SubjectRe: [PATCH v2] firewire: ohci: enable MSI for VIA VT6315 rev 1, drop cycle timer quirk
On Jun 11 Stefan Richter wrote:
> Nice -- yesterday, just a few days after this patch went into the
> mainline, this VT6315 card suddenly stopped to generate any interrupt
> while being in use with a soundcard and jackd. Until then it ran
> perfectly for many days, with jackd+ffado's combined workload of
> AT/AR/IT/IR but also with SBP-2 workloads and one or another other
> application as well.
> Now I apparently need to run long-term tests with MSI switched off in order
> to find out whether this malfunction is MSI related.

PS, this is the state of the card just now after this failure:

10:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6315 Series Firewire Controller (rev 01) (prog-if 10 [OHCI])
Subsystem: VIA Technologies, Inc. VT6315 Series Firewire Controller
Flags: bus master, fast devsel, latency 0, IRQ 74

$ grep "74:" /proc/interrupts
74: 132906417 17969317 15309448 18166551 42716375 33292391 30609551 28301206 PCI-MSI-edge firewire_ohci

I am used to defective MSI support manifesting itself right after driver
initialization, not after long periods of use with, say, 319271256 proper
interrupts before it goes belly-up. And indeed, the issue with VT6315
rev 0 was an instantaneous malfunction, not a rare and random one
I wonder what's up with my VT6315 rev 1.
Stefan Richter
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