target/transport: add flag to indicate CPU Affinity is observed

BugLink: http://bugs.launchpad.net/bugs/1552332
Signed-off-by: Quinn Tran <quinn.tran@qlogic.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Fixes: fb3269b ("qla2xxx: Add selective command queuing")
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
(back ported from commit 9095adaab8c1d82707e4e9961b6ad79b62f3361b)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Conflicts:
	include/target/target_core_base.h

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index b5158a4a243f4e5e0f415614d97998896d02dc23..930a036afca59ef589a659de9cf8d1d7399df063 100644 (file)
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -715,10 +715,10 @@ void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
        cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE);
        spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
-       if (cmd->cpuid == -1)
-               queue_work(target_completion_wq, &cmd->work);
-       else
+       if (cmd->se_cmd_flags & SCF_USE_CPUID)
                queue_work_on(cmd->cpuid, target_completion_wq, &cmd->work);
+       else
+               queue_work(target_completion_wq, &cmd->work);
 }
 EXPORT_SYMBOL(target_complete_cmd);
 
@@ -1431,6 +1431,12 @@ int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess
         */
        transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
                                data_length, data_dir, task_attr, sense);
+
+       if (flags & TARGET_SCF_USE_CPUID)
+               se_cmd->se_cmd_flags |= SCF_USE_CPUID;
+       else
+               se_cmd->cpuid = WORK_CPU_UNBOUND;
+
        if (flags & TARGET_SCF_UNKNOWN_SIZE)
                se_cmd->unknown_data_length = 1;
        /*

diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 3310ef1da3cb81578c0c4c060b2cb236e9b8c516..37ef694773d5f439ff78ec82a0a504a16c7564d2 100644 (file)
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -138,6 +138,8 @@ enum se_cmd_flags_table {
        SCF_COMPARE_AND_WRITE           = 0x00080000,
        SCF_COMPARE_AND_WRITE_POST      = 0x00100000,
        SCF_PASSTHROUGH_PROT_SG_TO_MEM_NOALLOC = 0x00200000,
+       SCF_ACK_KREF                    = 0x00400000,
+       SCF_USE_CPUID                   = 0x00800000,
 };
 
 /* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
@@ -185,6 +187,7 @@ enum target_sc_flags_table {
        TARGET_SCF_BIDI_OP              = 0x01,
        TARGET_SCF_ACK_KREF             = 0x02,
        TARGET_SCF_UNKNOWN_SIZE         = 0x04,
+       TARGET_SCF_USE_CPUID    = 0x08,
 };
 
 /* fabric independent task management function values */