Date: Wed, 16 Apr 2014 01:08:08 +0200 From: Stefan Richter Subject: firewire: ohci: enable MSI for VIA VT6315 rev 1, drop cycle timer quirk Commit af0cdf494781 "firewire: ohci: fix regression with VIA VT6315, disable MSI" acted upon a report against VT6315 rev 0: http://linux.derkeiler.com/Mailing-Lists/Kernel/2010-12/msg02301.html $ lspci -nn VIA Technologies, Inc. VT6315 Series Firewire Controller [1106:3403] I now got a card with $ lspci -nn VIA Technologies, Inc. VT6315 Series Firewire Controller [1106:3403] (rev 01) and this works fine with MSI enabled. Second, I tested this VT6315 rev 1 without CYCLE_TIMER quirk flag using http://me.in-berlin.de/~s5r6/linux1394/utils/test_cycle_time_v20100125.c and found that this chip does in fact access the cycle timer atomically. Things I can't test because I don't have the hardware: - whether VT6315 rev 0 really needs QUIRK_CYCLE_TIMER, - whether the VT6320 PCI device needs QUIRK_CYCLE_TIMER, - whether the VT6325 and VT6330 PCIe devices need QUIRK_CYCLE_TIMER and QUIRK_NO_MSI. Hence, just add a whitelist entry specifically for VT6315 rev >= 1 without any quirk flags. Before this entry we need an extra entry to catch VT6315 rev <= 0 due to how our ID matching logic works. Signed-off-by: Stefan Richter --- drivers/firewire/ohci.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/firewire/ohci.c +++ b/drivers/firewire/ohci.c @@ -282,6 +282,7 @@ static char ohci_driver_name[] = KBUILD_ #define PCI_DEVICE_ID_TI_TSB82AA2 0x8025 #define PCI_DEVICE_ID_VIA_VT630X 0x3044 #define PCI_REV_ID_VIA_VT6306 0x46 +#define PCI_DEVICE_ID_VIA_VT6315 0x3403 #define QUIRK_CYCLE_TIMER 0x1 #define QUIRK_RESET_PACKET 0x2 @@ -334,6 +335,12 @@ static const struct { {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT630X, PCI_REV_ID_VIA_VT6306, QUIRK_CYCLE_TIMER | QUIRK_IR_WAKE}, + {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT6315, 0, + QUIRK_CYCLE_TIMER | QUIRK_NO_MSI}, + + {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VT6315, PCI_ANY_ID, + 0}, + {PCI_VENDOR_ID_VIA, PCI_ANY_ID, PCI_ANY_ID, QUIRK_CYCLE_TIMER | QUIRK_NO_MSI}, };