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scsi: target: tcmu: Use priv pointer in se_cmd 

We initialize and clean up the se_cmd's priv pointer under cmd_ring_lock to
point to the corresponding tcmu_cmd.

In the patch that implements tmr_notify callback in tcmu we will use the
priv pointer.

Link: https://lore.kernel.org/r/20200726153510.13077-4-bstroesser@ts.fujitsu.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bodo Stroesser 2020-07-26 17:35:05 +02:00 committed by Martin K. Petersen
parent 2e45a1a9c7
commit a35129024e
1 changed files with 5 additions and 2 deletions
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7
drivers/target/target_core_user.c
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@ -541,6 +541,8 @@ tcmu_get_block_page(struct tcmu_dev *udev, uint32_t dbi)
static inline void tcmu_free_cmd(struct tcmu_cmd *tcmu_cmd)
{
if (tcmu_cmd->se_cmd)
tcmu_cmd->se_cmd->priv = NULL;
kfree(tcmu_cmd->dbi);
kmem_cache_free(tcmu_cmd_cache, tcmu_cmd);
}
@ -1109,10 +1111,11 @@ tcmu_queue_cmd(struct se_cmd *se_cmd)
return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
mutex_lock(&udev->cmdr_lock);
se_cmd->priv = tcmu_cmd;
ret = queue_cmd_ring(tcmu_cmd, &scsi_ret);
mutex_unlock(&udev->cmdr_lock);
if (ret < 0)
tcmu_free_cmd(tcmu_cmd);
mutex_unlock(&udev->cmdr_lock);
return scsi_ret;
}
@ -1179,7 +1182,6 @@ done:
target_complete_cmd(cmd->se_cmd, entry->rsp.scsi_status);
out:
cmd->se_cmd = NULL;
tcmu_cmd_free_data(cmd, cmd->dbi_cnt);
tcmu_free_cmd(cmd);
}
@ -1285,6 +1287,7 @@ static void tcmu_check_expired_ring_cmd(struct tcmu_cmd *cmd)
set_bit(TCMU_CMD_BIT_EXPIRED, &cmd->flags);
list_del_init(&cmd->queue_entry);
se_cmd = cmd->se_cmd;
se_cmd->priv = NULL;
cmd->se_cmd = NULL;
pr_debug("Timing out inflight cmd %u on dev %s.\n",