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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2011-05-01 21:06:42 +0200 |
|---|---|---|
| committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2011-05-10 22:53:46 +0200 |
| commit | 81bf52d8622f05cfe89893fd5c1101efd85f855b (patch) | |
| tree | eaad1608312ce1995082c06951af5a194fd66a52 | |
| parent | firewire: sbp2: omit Scsi_Host lock from queuecommand (diff) | |
| download | linux-81bf52d8622f05cfe89893fd5c1101efd85f855b.tar.xz linux-81bf52d8622f05cfe89893fd5c1101efd85f855b.zip | |
firewire: sbp2: octlet AT payloads can be stack-allocated
We do not need slab allocations for ORB pointer write transactions
anymore in order to satisfy streaming DMA mapping constraints, thanks to
commit da28947e7e36 "firewire: ohci: avoid separate DMA mapping for
small AT payloads".
(Besides, the slab-allocated buffers that firewire-sbp2 used to provide
for 8-byte write requests were still not fully portable since they
shared a cacheline with unrelated CPU-accessed data.)
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
| -rw-r--r-- | drivers/firewire/sbp2.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c index cc002e92275a..2aafc614ae14 100644 --- a/drivers/firewire/sbp2.c +++ b/drivers/firewire/sbp2.c @@ -258,7 +258,6 @@ struct sbp2_orb { struct kref kref; dma_addr_t request_bus; int rcode; - struct sbp2_pointer pointer; void (*callback)(struct sbp2_orb * orb, struct sbp2_status * status); struct list_head link; }; @@ -490,10 +489,11 @@ static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, int node_id, int generation, u64 offset) { struct fw_device *device = target_device(lu->tgt); + struct sbp2_pointer orb_pointer; unsigned long flags; - orb->pointer.high = 0; - orb->pointer.low = cpu_to_be32(orb->request_bus); + orb_pointer.high = 0; + orb_pointer.low = cpu_to_be32(orb->request_bus); spin_lock_irqsave(&device->card->lock, flags); list_add_tail(&orb->link, &lu->orb_list); @@ -504,7 +504,7 @@ static void sbp2_send_orb(struct sbp2_orb *orb, struct sbp2_logical_unit *lu, fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST, node_id, generation, device->max_speed, offset, - &orb->pointer, 8, complete_transaction, orb); + &orb_pointer, 8, complete_transaction, orb); } static int sbp2_cancel_orbs(struct sbp2_logical_unit *lu) |