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iscsi-target: Avoid unnecessary t_state_lock during unsolicited data-out check

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In modern iscsi-target code, the setup and I/O submission is done within a
single process context, so there is no need to acquire se_cmd->t_state_lock while
checking SCF_SUPPORTED_SAM_OPCODE for determining when unsolicited data-out
should be dumped.

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 01:58:49 -07:00
parent b28e545c4d
commit b9da5826df
1 changed files with 0 additions and 6 deletions
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6
drivers/target/iscsi/iscsi_target.c
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@ -1277,7 +1277,6 @@ iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf,
struct iscsi_data *hdr = (struct iscsi_data *)buf;
struct iscsi_cmd *cmd = NULL;
struct se_cmd *se_cmd;
unsigned long flags;
u32 payload_length = ntoh24(hdr->dlength);
int rc;
@ -1356,14 +1355,9 @@ iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf,
*/
/* Something's amiss if we're not in WRITE_PENDING state... */
spin_lock_irqsave(&se_cmd->t_state_lock, flags);
WARN_ON(se_cmd->t_state != TRANSPORT_WRITE_PENDING);
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
spin_lock_irqsave(&se_cmd->t_state_lock, flags);
if (!(se_cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE))
dump_unsolicited_data = 1;
spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
if (dump_unsolicited_data) {
/*