The patch below was submitted to be applied to the 4.1-stable tree.
I fail to see how this patch meets the stable kernel rules as found at
Documentation/stable_kernel_rules.txt.
I could be totally wrong, and if so, please respond to
<stable@xxxxxxxxxxxxxxx> and let me know why this patch should be
applied. Otherwise, it is now dropped from my patch queues, never to be
seen again.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 7359df25a53386dd33c223672bbd12cb49d0ce4f Mon Sep 17 00:00:00 2001
From: Alexei Potashnik <alexei@xxxxxxxxxxxxxxx>
Date: Tue, 14 Jul 2015 16:00:49 -0400
Subject: [PATCH] qla2xxx: terminate exchange when command is aborted by LIO
The newly introduced aborted_task TFO callback has to terminate
exchange with QLogic driver, since command is being deleted and
no status will be queued to the driver at a later point.
This patch also moves the burden of releasing one cmd refcount to
the aborted_task handler.
Changed iSCSI aborted_task logic to satisfy the above requirement.
Cc: <stable@xxxxxxxxxxxxxxx> # v3.18+
Signed-off-by: Alexei Potashnik <alexei@xxxxxxxxxxxxxxx>
Acked-by: Quinn Tran <quinn.tran@xxxxxxxxxx>
Signed-off-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index b60f9075e9f7..58651ecbd88c 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1924,20 +1924,6 @@ static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
struct qla_hw_data *ha = vha->hw;
struct se_cmd *se_cmd = &cmd->se_cmd;
- if (unlikely(cmd->aborted)) {
- ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
- "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)",
- vha->vp_idx, cmd, se_cmd, se_cmd->tag);
-
- cmd->state = QLA_TGT_STATE_ABORTED;
- cmd->cmd_flags |= BIT_6;
-
- qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
-
- /* !! At this point cmd could be already freed !! */
- return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
- }
-
prm->cmd = cmd;
prm->tgt = tgt;
prm->rq_result = scsi_status;
@@ -2524,9 +2510,6 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
&full_req_cnt);
if (unlikely(res != 0)) {
- if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
- return 0;
-
return res;
}
@@ -3092,6 +3075,24 @@ static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
}
+void qlt_abort_cmd(struct qla_tgt_cmd *cmd)
+{
+ struct qla_tgt *tgt = cmd->tgt;
+ struct scsi_qla_host *vha = tgt->vha;
+ struct se_cmd *se_cmd = &cmd->se_cmd;
+
+ ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
+ "qla_target(%d): terminating exchange for aborted cmd=%p "
+ "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
+ se_cmd->tag);
+
+ cmd->state = QLA_TGT_STATE_ABORTED;
+ cmd->cmd_flags |= BIT_6;
+
+ qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
+}
+EXPORT_SYMBOL(qlt_abort_cmd);
+
void qlt_free_cmd(struct qla_tgt_cmd *cmd)
{
struct qla_tgt_sess *sess = cmd->sess;
diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h
index 2ceb60ffc5e9..bca584ae45b7 100644
--- a/drivers/scsi/qla2xxx/qla_target.h
+++ b/drivers/scsi/qla2xxx/qla_target.h
@@ -808,13 +808,6 @@ int qla2x00_wait_for_hba_online(struct scsi_qla_host *);
#define FC_TM_REJECT 4
#define FC_TM_FAILED 5
-/*
- * Error code of qlt_pre_xmit_response() meaning that cmd's exchange was
- * terminated, so no more actions is needed and success should be returned
- * to target.
- */
-#define QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED 0x1717
-
#if (BITS_PER_LONG > 32) || defined(CONFIG_HIGHMEM64G)
#define pci_dma_lo32(a) (a & 0xffffffff)
#define pci_dma_hi32(a) ((((a) >> 16)>>16) & 0xffffffff)
@@ -950,7 +943,6 @@ struct qla_tgt_cmd {
unsigned int conf_compl_supported:1;
unsigned int sg_mapped:1;
unsigned int free_sg:1;
- unsigned int aborted:1; /* Needed in case of SRR */
unsigned int write_data_transferred:1;
unsigned int ctx_dsd_alloced:1;
unsigned int q_full:1;
@@ -1134,6 +1126,7 @@ static inline uint32_t sid_to_key(const uint8_t *s_id)
extern void qlt_response_pkt_all_vps(struct scsi_qla_host *, response_t *);
extern int qlt_rdy_to_xfer(struct qla_tgt_cmd *);
extern int qlt_xmit_response(struct qla_tgt_cmd *, int, uint8_t);
+extern void qlt_abort_cmd(struct qla_tgt_cmd *);
extern void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *);
extern void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *);
extern void qlt_free_cmd(struct qla_tgt_cmd *cmd);
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index 4e242c757947..9224a06646e6 100644
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -541,7 +541,6 @@ static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
cmd->cmd_flags |= BIT_4;
cmd->bufflen = se_cmd->data_length;
cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
- cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
cmd->sg_cnt = se_cmd->t_data_nents;
cmd->sg = se_cmd->t_data_sg;
@@ -570,7 +569,6 @@ static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
cmd->sg_cnt = 0;
cmd->offset = 0;
cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
- cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
if (cmd->cmd_flags & BIT_5) {
pr_crit("Bit_5 already set for cmd = %p.\n", cmd);
dump_stack();
@@ -635,14 +633,7 @@ static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
{
struct qla_tgt_cmd *cmd = container_of(se_cmd,
struct qla_tgt_cmd, se_cmd);
- struct scsi_qla_host *vha = cmd->vha;
- struct qla_hw_data *ha = vha->hw;
-
- if (!cmd->sg_mapped)
- return;
-
- pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
- cmd->sg_mapped = 0;
+ qlt_abort_cmd(cmd);
}
static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html