Alan Stern <stern@...> writes: > > On Thu, 23 Jan 2014, Josh Bendavid wrote: > > > Hi Alan, > > Is it understood why/how this always happens when the interrupt counter for > > this device reaches exactly 200001? I would have assumed that this was a > > software counter in the kernel, in which case I don't see how this could > > correlate to a hardware bug. > > The kernel keeps track of unhandled interrupts, and you get that > "nobody cared" error when the number exceeds 99900 in a 0.1-second > period. But the test for this condition occurs only at intervals of > 100000 interrupts. > > In any case, you can try applying the patch below. It should print out > some relevant information for the 100 interrupts before and after > number 200001. In particular, we should be able to tell whether or not > each interrupt was handled by ohci-hcd. > > Alan Stern > > Index: usb-3.13/drivers/usb/host/ohci-hcd.c > =================================================================== > --- usb-3.13.orig/drivers/usb/host/ohci-hcd.c > +++ usb-3.13/drivers/usb/host/ohci-hcd.c > <at> <at> -784,6 +784,7 <at> <at> static irqreturn_t ohci_irq (struct usb_ > struct ohci_hcd *ohci = hcd_to_ohci (hcd); > struct ohci_regs __iomem *regs = ohci->regs; > int ints; > + static int alancnt; > > /* Read interrupt status (and flush pending writes). We ignore the > * optimization of checking the LSB of hcca->done_head; it doesn't > <at> <at> -791,6 +792,11 <at> <at> static irqreturn_t ohci_irq (struct usb_ > */ > ints = ohci_readl(ohci, ®s->intrstatus); > > + if (++alancnt >= 199900 && alancnt < 200100) > + ohci_info(ohci, "IRQ %d status %x enable %x\n", > + alancnt, ints, > + ohci_readl(ohci, ®s->intrenable)); > + > /* Check for an all 1's result which is a typical consequence > * of dead, unclocked, or unplugged (CardBus...) devices > */ > > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@... > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Hi Alan, (sorry for the delay) With this last patch (but NOT including the earlier workaround patch), I get this additional output periodically in the dmseg [ 6998.342658] mceusb 4-3:1.0: rx data: 9e 52 82 24 86 23 87 0e 87 23 87 7f 7f 7f 7f 7f 7f 6e 87 23 87 0e 86 0f 86 0f 87 0e 86 0f 86 (length=31) [ 6998.342662] mceusb 4-3:1.0: Raw IR data, 30 pulse/space samples [ 6998.342665] mceusb 4-3:1.0: Storing space with duration 4100000 [ 6998.342668] mceusb 4-3:1.0: Storing pulse with duration 100000 [ 6998.342671] mceusb 4-3:1.0: Storing space with duration 1800000 [ 6998.342674] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.342677] mceusb 4-3:1.0: Storing space with duration 1750000 [ 6998.342680] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.342682] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.342685] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.342688] mceusb 4-3:1.0: Storing space with duration 1750000 [ 6998.342691] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.342694] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.342697] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.342699] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.342702] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.342705] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.342708] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.342711] mceusb 4-3:1.0: Storing space with duration 5500000 [ 6998.342713] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.342716] mceusb 4-3:1.0: Storing space with duration 1750000 [ 6998.342719] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.342722] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.342725] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.342727] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.342730] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.342733] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.342736] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.342739] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.342742] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.342744] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.342747] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.342750] mceusb 4-3:1.0: processed IR data, calling ir_raw_event_handle [ 6998.348752] systemd-journald[195]: Vacuuming done, freed 131072 bytes [ 6998.442670] mceusb 4-3:1.0: rx data: 9e 7f 7f 7f 26 86 24 86 0e 87 0e 87 0e 87 0e 87 23 87 0e 87 0e 86 24 86 0f 86 24 86 24 86 24 (length=31) [ 6998.442674] mceusb 4-3:1.0: Raw IR data, 30 pulse/space samples [ 6998.442677] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.442681] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.442683] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.442686] mceusb 4-3:1.0: Storing space with duration 1900000 [ 6998.442692] mceusb 4-3:1.0: Storing space with duration 1800000 [ 6998.442695] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.442698] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.442701] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.442703] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.442706] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.442709] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.442712] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.442715] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.442718] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.442720] mceusb 4-3:1.0: Storing space with duration 1750000 [ 6998.442723] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.442726] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.442729] mceusb 4-3:1.0: Storing pulse with duration 350000 [ 6998.442732] mceusb 4-3:1.0: Storing space with duration 700000 [ 6998.442735] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.442737] mceusb 4-3:1.0: Storing space with duration 1800000 [ 6998.442740] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.442743] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.442746] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.442749] mceusb 4-3:1.0: Storing space with duration 1800000 [ 6998.442752] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.442754] mceusb 4-3:1.0: Storing space with duration 1800000 [ 6998.442757] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.442760] mceusb 4-3:1.0: Storing space with duration 1800000 [ 6998.442763] mceusb 4-3:1.0: processed IR data, calling ir_raw_event_handle [ 6998.542729] mceusb 4-3:1.0: rx data: 99 d9 0f 86 0f 86 0f 86 24 86 0f 86 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f 7f (length=26) [ 6998.542733] mceusb 4-3:1.0: Raw IR data, 25 pulse/space samples [ 6998.542736] mceusb 4-3:1.0: Storing pulse with duration 4450000 [ 6998.542740] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.542742] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.542745] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.542748] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.542751] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.542754] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.542757] mceusb 4-3:1.0: Storing space with duration 1800000 [ 6998.542760] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.542762] mceusb 4-3:1.0: Storing space with duration 750000 [ 6998.542765] mceusb 4-3:1.0: Storing pulse with duration 300000 [ 6998.542768] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542771] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542774] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542777] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542779] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542782] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542785] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542788] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542790] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542793] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542796] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542799] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542801] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542804] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.542807] mceusb 4-3:1.0: processed IR data, calling ir_raw_event_handle [ 6998.642658] mceusb 4-3:1.0: rx data: 82 7f 5f (length=3) [ 6998.642662] mceusb 4-3:1.0: Raw IR data, 2 pulse/space samples [ 6998.642665] mceusb 4-3:1.0: Storing space with duration 6350000 [ 6998.642668] mceusb 4-3:1.0: Storing space with duration 4750000 [ 6998.642671] mceusb 4-3:1.0: rx data: 80 (length=1) [ 6998.642674] mceusb 4-3:1.0: End of raw IR data [ 6998.642677] mceusb 4-3:1.0: processed IR data, calling ir_raw_event_handle -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at 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