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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-08-30 02:11:40 +0400 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-10-17 02:00:08 +0400 |
| commit | 02ff8f8ee151e880414b99a11f67cae0cecd4977 (patch) | |
| tree | bafdb5af973e0010fb46ea21a2c4f4550a5d8a4d /drivers/firewire | |
| parent | ab88ca488b8af66c3defa165874e81e695319a19 (diff) | |
| download | linux-02ff8f8ee151e880414b99a11f67cae0cecd4977.tar.xz | |
firewire: fw-ohci: check for misconfigured bus (phyID == 63)
Check NodeID.nodeNumber as per OHCI 1.1 clause 7.2.3.2. See also IEEE
1394a table 5B-1.
Also, demote the "node ID not valid" message from error to notification
as it is not an error condition.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
| -rw-r--r-- | drivers/firewire/fw-ohci.c | 9 | ||||
| -rw-r--r-- | drivers/firewire/fw-ohci.h | 2 |
2 files changed, 9 insertions, 2 deletions
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index ec70c9f91171..2f307c4df335 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -917,10 +917,15 @@ static void bus_reset_tasklet(unsigned long data) reg = reg_read(ohci, OHCI1394_NodeID); if (!(reg & OHCI1394_NodeID_idValid)) { - fw_error("node ID not valid, new bus reset in progress\n"); + fw_notify("node ID not valid, new bus reset in progress\n"); return; } - ohci->node_id = reg & 0xffff; + if ((reg & OHCI1394_NodeID_nodeNumber) == 63) { + fw_notify("malconfigured bus\n"); + return; + } + ohci->node_id = reg & (OHCI1394_NodeID_busNumber | + OHCI1394_NodeID_nodeNumber); /* * The count in the SelfIDCount register is the number of diff --git a/drivers/firewire/fw-ohci.h b/drivers/firewire/fw-ohci.h index fa15706397d7..dec4f04e6b24 100644 --- a/drivers/firewire/fw-ohci.h +++ b/drivers/firewire/fw-ohci.h @@ -59,6 +59,8 @@ #define OHCI1394_LinkControl_cycleSource (1 << 22) #define OHCI1394_NodeID 0x0E8 #define OHCI1394_NodeID_idValid 0x80000000 +#define OHCI1394_NodeID_nodeNumber 0x0000003f +#define OHCI1394_NodeID_busNumber 0x0000ffc0 #define OHCI1394_PhyControl 0x0EC #define OHCI1394_PhyControl_Read(addr) (((addr) << 8) | 0x00008000) #define OHCI1394_PhyControl_ReadDone 0x80000000 |