lkml.org 
[lkml]   [2014]   [Apr]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH v2] firewire: ohci: enable MSI for VIA VT6315 rev 1, drop cycle timer quirk
Date: 
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
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 <stefanr@s5r6.in-berlin.de>
---
v2: Oops, a table entry is applied if dev->revision <= table[i].revision.

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},
};

--
Stefan Richter
-=====-====- -=-- =----
http://arcgraph.de/sr/

\
 
 \ /
  Last update: 2014-04-16 02:01    [W:0.048 / U:46.544 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site