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path: root/drivers/firewire/fw-sbp2.c
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Diffstat (limited to 'drivers/firewire/fw-sbp2.c')
-rw-r--r--drivers/firewire/fw-sbp2.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index e54403ee59e7..e88d5067448c 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -670,17 +670,6 @@ static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
&d, sizeof(d), complete_agent_reset_write_no_wait, t);
}
-static void sbp2_set_generation(struct sbp2_logical_unit *lu, int generation)
-{
- struct fw_card *card = fw_device(lu->tgt->unit->device.parent)->card;
- unsigned long flags;
-
- /* serialize with comparisons of lu->generation and card->generation */
- spin_lock_irqsave(&card->lock, flags);
- lu->generation = generation;
- spin_unlock_irqrestore(&card->lock, flags);
-}
-
static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
{
/*
@@ -884,7 +873,7 @@ static void sbp2_login(struct work_struct *work)
goto out;
generation = device->generation;
- smp_rmb(); /* node_id must not be older than generation */
+ smp_rmb(); /* node IDs must not be older than generation */
node_id = device->node_id;
local_node_id = device->card->node_id;
@@ -908,7 +897,8 @@ static void sbp2_login(struct work_struct *work)
tgt->node_id = node_id;
tgt->address_high = local_node_id << 16;
- sbp2_set_generation(lu, generation);
+ smp_wmb(); /* node IDs must not be older than generation */
+ lu->generation = generation;
lu->command_block_agent_address =
((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
@@ -1201,7 +1191,7 @@ static void sbp2_reconnect(struct work_struct *work)
goto out;
generation = device->generation;
- smp_rmb(); /* node_id must not be older than generation */
+ smp_rmb(); /* node IDs must not be older than generation */
node_id = device->node_id;
local_node_id = device->card->node_id;
@@ -1228,7 +1218,8 @@ static void sbp2_reconnect(struct work_struct *work)
tgt->node_id = node_id;
tgt->address_high = local_node_id << 16;
- sbp2_set_generation(lu, generation);
+ smp_wmb(); /* node IDs must not be older than generation */
+ lu->generation = generation;
fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
tgt->bus_id, lu->lun, lu->retries);