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authorNicholas Bellinger <nab@linux-iscsi.org>2016-01-29 22:08:54 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2016-03-10 21:48:23 -0800
commit91973cd60e2db7536228ce2732ffea4e50d03ca9 (patch)
tree0942363ef2dea335def38fa5bf3fa9f3f0c66752 /drivers/target/tcm_fc
parentfa22e7b7741b202ee8f0cb28461189418d9b52ea (diff)
tcm_fc: Convert to TARGET_SCF_ACK_KREF I/O + TMR krefs
This patch converts tcm_fc to modern TARGET_SCF_ACK_KREF usage for ft_queue_status(), and fixes ft_check_stop_free() to return transport_generic_free_cmd() for ->cmd_kref. It also converts TM request -> ft_send_tm() to use ACK_KREF, and update ft_queue_tm_resp() to drop the outstanding kref after queueing TM response into fabric code. Cc: Vasu Dev <vasu.dev@linux.intel.com> Cc: Mark Rustad <mark.d.rustad@intel.com> Cc: Robert Love <robert.w.love@intel.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/tcm_fc')
-rw-r--r--drivers/target/tcm_fc/tfc_cmd.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c
index 064d6dfb5b6d..216e18cc9133 100644
--- a/drivers/target/tcm_fc/tfc_cmd.c
+++ b/drivers/target/tcm_fc/tfc_cmd.c
@@ -107,8 +107,7 @@ void ft_release_cmd(struct se_cmd *se_cmd)
int ft_check_stop_free(struct se_cmd *se_cmd)
{
- transport_generic_free_cmd(se_cmd, 0);
- return 1;
+ return transport_generic_free_cmd(se_cmd, 0);
}
/*
@@ -179,6 +178,12 @@ int ft_queue_status(struct se_cmd *se_cmd)
return -ENOMEM;
}
lport->tt.exch_done(cmd->seq);
+ /*
+ * Drop the extra ACK_KREF reference taken by target_submit_cmd()
+ * ahead of ft_check_stop_free() -> transport_generic_free_cmd()
+ * final se_cmd->cmd_kref put.
+ */
+ target_put_sess_cmd(&cmd->se_cmd);
return 0;
}
@@ -387,7 +392,7 @@ static void ft_send_tm(struct ft_cmd *cmd)
/* FIXME: Add referenced task tag for ABORT_TASK */
rc = target_submit_tmr(&cmd->se_cmd, cmd->sess->se_sess,
&cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun),
- cmd, tm_func, GFP_KERNEL, 0, 0);
+ cmd, tm_func, GFP_KERNEL, 0, TARGET_SCF_ACK_KREF);
if (rc < 0)
ft_send_resp_code_and_free(cmd, FCP_TMF_FAILED);
}
@@ -422,6 +427,12 @@ void ft_queue_tm_resp(struct se_cmd *se_cmd)
pr_debug("tmr fn %d resp %d fcp code %d\n",
tmr->function, tmr->response, code);
ft_send_resp_code(cmd, code);
+ /*
+ * Drop the extra ACK_KREF reference taken by target_submit_tmr()
+ * ahead of ft_check_stop_free() -> transport_generic_free_cmd()
+ * final se_cmd->cmd_kref put.
+ */
+ target_put_sess_cmd(&cmd->se_cmd);
}
void ft_aborted_task(struct se_cmd *se_cmd)
@@ -560,7 +571,8 @@ static void ft_send_work(struct work_struct *work)
*/
if (target_submit_cmd(&cmd->se_cmd, cmd->sess->se_sess, fcp->fc_cdb,
&cmd->ft_sense_buffer[0], scsilun_to_int(&fcp->fc_lun),
- ntohl(fcp->fc_dl), task_attr, data_dir, 0))
+ ntohl(fcp->fc_dl), task_attr, data_dir,
+ TARGET_SCF_ACK_KREF))
goto err;
pr_debug("r_ctl %x alloc target_submit_cmd\n", fh->fh_r_ctl);

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