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target: Drop unnecessary CMD_T_DEV_ACTIVE check from transport_lun_remove_cmd

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This patch drops an unnecessary acquire/release of se_cmd->t_state_lock within
transport_lun_remove_cmd() when checking CMD_T_DEV_ACTIVE for invoking
target_remove_from_state_list().

For all fast path completion cases, transport_lun_remove_cmd() is always
called ahead of transport_cmd_check_stop(), and since transport_cmd_check_stop()
is calling target_remove_from_state_list() when remove_from_lists=true,
the t_state_lock usage in transport_lun_remove_cmd() can safely be removed.

Cc: Christoph Hellwig <[email protected]>
Cc: Roland Dreier <[email protected]>
Cc: Kent Overstreet <[email protected]>
Cc: Or Gerlitz <[email protected]>
Cc: Moussa Ba <[email protected]>
Signed-off-by: Nicholas Bellinger <[email protected]>
This commit is contained in:
Nicholas Bellinger 2013-06-06 01:36:41 -07:00
commit 0b66818ac6
1 changed files with 0 additions and 7 deletions
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7
drivers/target/target_core_transport.c
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@ -530,13 +530,6 @@ static void transport_lun_remove_cmd(struct se_cmd *cmd)
if (!lun)
return;
spin_lock_irqsave(&cmd->t_state_lock, flags);
if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
target_remove_from_state_list(cmd);
}
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
spin_lock_irqsave(&lun->lun_cmd_lock, flags);
if (!list_empty(&cmd->se_lun_node))
list_del_init(&cmd->se_lun_node);