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authorKristian Høgsberg <krh@redhat.com>2007-04-10 18:11:20 -0400
committerStefan Richter <stefanr@s5r6.in-berlin.de>2007-04-12 00:18:57 +0200
commit12f26aa1b172a32604fedcb98d68c7aef268d6ad (patch)
treeefa6fff9b9ae825c7a99a97279f973e8966bad3b /drivers/firewire
parentfbb5423c1df99c846677480ce44588176352f7d9 (diff)
downloadop-kernel-dev-12f26aa1b172a32604fedcb98d68c7aef268d6ad.zip
op-kernel-dev-12f26aa1b172a32604fedcb98d68c7aef268d6ad.tar.gz
firewire: Only free ORBs that completed the initial transaction.
In some situations we can receive the ORB status write before we have received the ORB pointer write response. When this happens, we assume that the fw_transaction is finished and free the ORB struct containing the fw_transaction. This fix make the status write logic only accept status writes for ORBs where the initial ORB pointer write transaction finished. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/fw-sbp2.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index a752523..c1e9316 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -293,7 +293,8 @@ sbp2_status_write(struct fw_card *card, struct fw_request *request,
spin_lock_irqsave(&card->lock, flags);
list_for_each_entry(orb, &sd->orb_list, link) {
if (status_get_orb_high(status) == 0 &&
- status_get_orb_low(status) == orb->request_bus) {
+ status_get_orb_low(status) == orb->request_bus &&
+ orb->rcode == RCODE_COMPLETE) {
list_del(&orb->link);
break;
}
@@ -968,6 +969,8 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
goto fail_alloc;
}
+ /* Initialize rcode to something not RCODE_COMPLETE. */
+ orb->base.rcode = -1;
orb->base.request_bus =
dma_map_single(device->card->device, &orb->request,
sizeof orb->request, DMA_TO_DEVICE);
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