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target: Drop unnecessary t_state_lock access for SCF_SUPPORTED_SAM_OPCODE assignment

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This patch drops the se_cmd->t_state_lock access around SCF_SUPPORTED_SAM_OPCODE
assignment within target_setup_cmd_from_cdb().

Original v4.0 target code required this as fabrics would be checking for
this values in different process contexts for setup and I/O submission.

Given that modern v4.1 target code performs setup and I/O submission
from the same process context, this t_state_lock access is no longer
required.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Roland Dreier <roland@kernel.org>
Cc: Kent Overstreet <koverstreet@google.com>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Moussa Ba <moussaba@micron.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2013-06-06 01:58:04 -07:00
parent 1a398b9731
commit b28e545c4d
1 changed files with 0 additions and 3 deletions
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3
drivers/target/target_core_transport.c
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@ -1089,7 +1089,6 @@ sense_reason_t
target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb)
{
struct se_device *dev = cmd->se_dev;
unsigned long flags;
sense_reason_t ret;
/*
@ -1149,9 +1148,7 @@ target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb)
if (ret)
return ret;
spin_lock_irqsave(&cmd->t_state_lock, flags);
cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
spin_unlock_irqrestore(&cmd->t_state_lock, flags);
spin_lock(&cmd->se_lun->lun_sep_lock);
if (cmd->se_lun->lun_sep)