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authorNicholas Bellinger <nab@linux-iscsi.org>2013-06-06 01:58:49 -0700
committerNicholas Bellinger <nab@linux-iscsi.org>2013-06-20 14:10:44 -0700
commitb9da5826df3936671ea67bc33f6fc8c2020526b8 (patch)
treeeecce0a859bf5048f8b9c683e4baf4cef2b62eaf /drivers/target
parentb28e545c4ddd7b594c64e8f3d9c2891eda253afc (diff)
downloadlinux-b9da5826df3936671ea67bc33f6fc8c2020526b8.tar.bz2
iscsi-target: Avoid unnecessary t_state_lock during unsolicited data-out check
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>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/iscsi/iscsi_target.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index d7705e5824fb..cc43d4163adc 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -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) {
/*