https://bugzilla.kernel.org/show_bug.cgi?id=42844
--- Comment #16 from WZab <w...@ise.pw.edu.pl> 2012-09-03 21:43:22 --- If the real cause of the problem is incorrect sharing of IRQ18 between the SMBus controller and the XHCI USB controler, maybe this could also explain the problems with USB transfers reported in the comment #3 in this bug: [ 603.808897] usb 3-2: new high-speed USB device number 2 using xhci_hcd [ 603.822521] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep [ 603.823026] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep [ 603.823505] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep [ 603.823622] usb 3-2: New USB device found, idVendor=12d1, idProduct=1446 [ 603.823626] usb 3-2: New USB device strings: Mfr=3, Product=2, [...] [ 609.550820] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint [ 609.553350] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint [ 609.553743] sd 23:0:0:0: [sdb] Attached SCSI removable disk [ 609.558444] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint [ 609.563097] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint [ 609.572390] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint [ 609.576895] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint So if my diagnosis is correct, the problem is neither USB bug, nor ACPI bug, but the bug in the I2C/SMbus driver. The smbalert_irq routine should quickly indentify if the interrupt cause is the I2C controller and return either IRQ_HANDLED or IRQ_NONE. Additionally it shouldn't block the interrupt in the interrupt controller (which can cause unacceptable latency in servicing of USB 3.0 interrupts), but in the I2C controller (is it possible in hardware independent manner?). -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
