diff options
| author | Roland Dreier <roland@purestorage.com> | 2015-09-08 16:14:18 +0300 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-09-11 10:32:28 +0300 |
| commit | 7dd03aca9d61a9b64cd2a8cf6f5ea6f1f5391e8d (patch) | |
| tree | 9dec30b18f9ec4626dd9c17bc99bb134726f80e4 /drivers/target/iscsi/iscsi_target_device.c | |
| parent | 4416f89b8cfcb794d040fc3b68e5fb159b7d8d02 (diff) | |
| download | linux-7dd03aca9d61a9b64cd2a8cf6f5ea6f1f5391e8d.tar.xz | |
target: Fix max_cmd_sn increment w/o cmdsn mutex regressions
Current for-next iscsi target is broken:
commit 109e2381749c1cfd94a0d22b2b54142539024973
Author: Roland Dreier <roland@purestorage.com>
Date: Thu Jul 23 14:53:32 2015 -0700
target: Drop iSCSI use of mutex around max_cmd_sn increment
This patch fixes incorrect pr_debug() + atomic_inc_return() usage
within iscsit_increment_maxcmdsn() code.
Also fix funny iscsit_determine_maxcmdsn() usage and update
iscsi_target_do_tx_login_io() code.
Reported-by: Sagi Grimberg <sagig@mellanox.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi/iscsi_target_device.c')
| -rw-r--r-- | drivers/target/iscsi/iscsi_target_device.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/target/iscsi/iscsi_target_device.c b/drivers/target/iscsi/iscsi_target_device.c index 07d2ef67dba6..0382fa24b53b 100644 --- a/drivers/target/iscsi/iscsi_target_device.c +++ b/drivers/target/iscsi/iscsi_target_device.c @@ -47,16 +47,19 @@ void iscsit_determine_maxcmdsn(struct iscsi_session *sess) * core_set_queue_depth_for_node(). */ sess->cmdsn_window = se_nacl->queue_depth; - atomic_set(&sess->max_cmd_sn, (u32) atomic_read(&sess->max_cmd_sn) + se_nacl->queue_depth - 1); + atomic_add(se_nacl->queue_depth - 1, &sess->max_cmd_sn); } void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess) { + u32 max_cmd_sn; + if (cmd->immediate_cmd || cmd->maxcmdsn_inc) return; cmd->maxcmdsn_inc = 1; - pr_debug("Updated MaxCmdSN to 0x%08x\n", atomic_inc_return(&sess->max_cmd_sn)); + max_cmd_sn = atomic_inc_return(&sess->max_cmd_sn); + pr_debug("Updated MaxCmdSN to 0x%08x\n", max_cmd_sn); } EXPORT_SYMBOL(iscsit_increment_maxcmdsn); |