firewire: fw_send_request_sync()
Share code between fw_send_request + wait_for_completion callers.
Signed-off-by: Jay Fenlason <fenlason@redhat.com>
Addendum:
Removes an unnecessary struct and an ununsed retry loop.
Calls it fw_run_transaction() instead of fw_send_request_sync().
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Acked-by: Kristian Høgsberg <krh@redhat.com>
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index bbd73a4..418c18f 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -189,39 +189,16 @@
63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40
};
-struct bm_data {
- struct fw_transaction t;
- struct {
- __be32 arg;
- __be32 data;
- } lock;
- u32 old;
- int rcode;
- struct completion done;
-};
-
-static void
-complete_bm_lock(struct fw_card *card, int rcode,
- void *payload, size_t length, void *data)
-{
- struct bm_data *bmd = data;
-
- if (rcode == RCODE_COMPLETE)
- bmd->old = be32_to_cpu(*(__be32 *) payload);
- bmd->rcode = rcode;
- complete(&bmd->done);
-}
-
static void
fw_card_bm_work(struct work_struct *work)
{
struct fw_card *card = container_of(work, struct fw_card, work.work);
struct fw_device *root_device;
struct fw_node *root_node, *local_node;
- struct bm_data bmd;
unsigned long flags;
- int root_id, new_root_id, irm_id, gap_count, generation, grace;
+ int root_id, new_root_id, irm_id, gap_count, generation, grace, rcode;
bool do_reset = false;
+ __be32 lock_data[2];
spin_lock_irqsave(&card->lock, flags);
local_node = card->local_node;
@@ -263,33 +240,28 @@
goto pick_me;
}
- bmd.lock.arg = cpu_to_be32(0x3f);
- bmd.lock.data = cpu_to_be32(local_node->node_id);
+ lock_data[0] = cpu_to_be32(0x3f);
+ lock_data[1] = cpu_to_be32(local_node->node_id);
spin_unlock_irqrestore(&card->lock, flags);
- init_completion(&bmd.done);
- fw_send_request(card, &bmd.t, TCODE_LOCK_COMPARE_SWAP,
- irm_id, generation,
- SCODE_100, CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID,
- &bmd.lock, sizeof(bmd.lock),
- complete_bm_lock, &bmd);
- wait_for_completion(&bmd.done);
+ rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
+ irm_id, generation, SCODE_100,
+ CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID,
+ lock_data, sizeof(lock_data));
- if (bmd.rcode == RCODE_GENERATION) {
- /*
- * Another bus reset happened. Just return,
- * the BM work has been rescheduled.
- */
+ if (rcode == RCODE_GENERATION)
+ /* Another bus reset, BM work has been rescheduled. */
goto out;
- }
- if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f)
+ if (rcode == RCODE_COMPLETE &&
+ lock_data[0] != cpu_to_be32(0x3f))
/* Somebody else is BM, let them do the work. */
goto out;
spin_lock_irqsave(&card->lock, flags);
- if (bmd.rcode != RCODE_COMPLETE) {
+
+ if (rcode != RCODE_COMPLETE) {
/*
* The lock request failed, maybe the IRM
* isn't really IRM capable after all. Let's