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| author |   Stefan Richter <stefanr@s5r6.in-berlin.de> | 2008-03-19 21:40:32 +0100 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2008-04-18 17:55:33 +0200 |
| commit | c8a9a498e16b2a6c0e4e367b1a01f80fdfd7b6e2 (patch) | |
| tree | f8e7fdab0bc3eefc98d6c0a09ab02337b6090371 /drivers/firewire | |
| parent | firewire: fw-ohci: refactor probe, remove, suspend, resume (diff) | |
| download | linux-dev-c8a9a498e16b2a6c0e4e367b1a01f80fdfd7b6e2.tar.xz linux-dev-c8a9a498e16b2a6c0e4e367b1a01f80fdfd7b6e2.zip | |
firewire: fw-ohci: add self ID error check
Discard self ID buffer contents if
- the selfIDError flag is set,
- any of the self ID packets has bit errors.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Jarod Wilson <jwilson@redhat.com>
Diffstat (limited to 'drivers/firewire')
| -rw-r--r-- | drivers/firewire/fw-ohci.c | 14 | ||||
| -rw-r--r-- | drivers/firewire/fw-ohci.h | 1 |
2 files changed, 11 insertions, 4 deletions
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c index 92ff38f82d96..1f6f15f0dce2 100644 --- a/drivers/firewire/fw-ohci.c +++ b/drivers/firewire/fw-ohci.c @@ -1019,20 +1019,26 @@ static void bus_reset_tasklet(unsigned long data) ohci->node_id = reg & (OHCI1394_NodeID_busNumber | OHCI1394_NodeID_nodeNumber); + reg = reg_read(ohci, OHCI1394_SelfIDCount); + if (reg & OHCI1394_SelfIDCount_selfIDError) { + fw_notify("inconsistent self IDs\n"); + return; + } /* * The count in the SelfIDCount register is the number of * bytes in the self ID receive buffer. Since we also receive * the inverted quadlets and a header quadlet, we shift one * bit extra to get the actual number of self IDs. */ - - self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff; + self_id_count = (reg >> 3) & 0x3ff; generation = (cond_le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff; rmb(); for (i = 1, j = 0; j < self_id_count; i += 2, j++) { - if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) - fw_error("inconsistent self IDs\n"); + if (ohci->self_id_cpu[i] != ~ohci->self_id_cpu[i + 1]) { + fw_notify("inconsistent self IDs\n"); + return; + } ohci->self_id_buffer[j] = cond_le32_to_cpu(ohci->self_id_cpu[i]); } diff --git a/drivers/firewire/fw-ohci.h b/drivers/firewire/fw-ohci.h index dec4f04e6b24..5754c6e9d595 100644 --- a/drivers/firewire/fw-ohci.h +++ b/drivers/firewire/fw-ohci.h @@ -30,6 +30,7 @@ #define OHCI1394_HCControl_softReset 0x00010000 #define OHCI1394_SelfIDBuffer 0x064 #define OHCI1394_SelfIDCount 0x068 +#define OHCI1394_SelfIDCount_selfIDError 0x80000000 #define OHCI1394_IRMultiChanMaskHiSet 0x070 #define OHCI1394_IRMultiChanMaskHiClear 0x074 #define OHCI1394_IRMultiChanMaskLoSet 0x078 |