firewire: fw-ohci: disable PHY packet reception into AR context

We want the rcvPhyPkt bit in LinkControl off before we start using the
chip.  However, the spec says that the reset value of it is undefined.
Hence switch it explicitly off.

https://bugzilla.redhat.com/show_bug.cgi?id=244576#c48 shows that for
example the nForce2 integrated FireWire controller seems to have it on
by default.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jarod Wilson <jwilson@redhat.com>

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index b062e736b78619811016c5b1fd0466c399a82a3f..481d3f3e2ef7dd7ea7f9efcc2b34e935688f6184 100644 (file)
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -1473,6 +1473,8 @@ static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length)
        reg_write(ohci, OHCI1394_HCControlClear,
                  OHCI1394_HCControl_noByteSwapData);
 
+       reg_write(ohci, OHCI1394_LinkControlClear,
+                 OHCI1394_LinkControl_rcvPhyPkt);
        reg_write(ohci, OHCI1394_LinkControlSet,
                  OHCI1394_LinkControl_rcvSelfID |
                  OHCI1394_LinkControl_cycleTimerEnable |