[PATCH v4 29/50] scsi: bnx2fc: Stop using the SCSI pointer

[Bart Van Assche <bvanassche@xxxxxxx>]

Set .cmd_size in the SCSI host template instead of using the SCSI pointer
from struct scsi_cmnd. Remove the CMD_SCSI_STATUS() assignment because the
assigned value is not used.

This patch prepares for removal of the SCSI pointer from struct scsi_cmnd.

Cc: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
 drivers/scsi/bnx2fc/bnx2fc.h      |  9 +++++++--
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c |  1 +
 drivers/scsi/bnx2fc/bnx2fc_io.c   | 23 +++++++++++------------
 3 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/bnx2fc/bnx2fc.h b/drivers/scsi/bnx2fc/bnx2fc.h
index b4cea8b06ea1..046247420cfa 100644
--- a/drivers/scsi/bnx2fc/bnx2fc.h
+++ b/drivers/scsi/bnx2fc/bnx2fc.h
@@ -137,8 +137,6 @@
 #define BNX2FC_FW_TIMEOUT		(3 * HZ)
 #define PORT_MAX			2
 
-#define CMD_SCSI_STATUS(Cmnd)		((Cmnd)->SCp.Status)
-
 /* FC FCP Status */
 #define	FC_GOOD				0
 
@@ -493,7 +491,14 @@ struct bnx2fc_unsol_els {
 	struct work_struct unsol_els_work;
 };
 
+struct bnx2fc_priv {
+	struct bnx2fc_cmd *io_req;
+};
 
+static inline struct bnx2fc_priv *bnx2fc_priv(struct scsi_cmnd *cmd)
+{
+	return scsi_cmd_priv(cmd);
+}
 
 struct bnx2fc_cmd *bnx2fc_cmd_alloc(struct bnx2fc_rport *tgt);
 struct bnx2fc_cmd *bnx2fc_elstm_alloc(struct bnx2fc_rport *tgt, int type);
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
index 68c4e3c3e7bb..f9a37ef57f1c 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
@@ -2979,6 +2979,7 @@ static struct scsi_host_template bnx2fc_shost_template = {
 	.track_queue_depth	= 1,
 	.slave_configure	= bnx2fc_slave_configure,
 	.shost_groups		= bnx2fc_host_groups,
+	.cmd_size		= sizeof(struct bnx2fc_priv),
 };
 
 static struct libfc_function_template bnx2fc_libfc_fcn_templ = {
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index b9114113ee73..962454f2e2b1 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -204,7 +204,7 @@ static void bnx2fc_scsi_done(struct bnx2fc_cmd *io_req, int err_code)
 		sc_cmd, host_byte(sc_cmd->result), sc_cmd->retries,
 		sc_cmd->allowed);
 	scsi_set_resid(sc_cmd, scsi_bufflen(sc_cmd));
-	sc_cmd->SCp.ptr = NULL;
+	bnx2fc_priv(sc_cmd)->io_req = NULL;
 	scsi_done(sc_cmd);
 }
 
@@ -765,7 +765,7 @@ static int bnx2fc_initiate_tmf(struct scsi_cmnd *sc_cmd, u8 tm_flags)
 	task = &(task_page[index]);
 	bnx2fc_init_mp_task(io_req, task);
 
-	sc_cmd->SCp.ptr = (char *)io_req;
+	bnx2fc_priv(sc_cmd)->io_req = io_req;
 
 	/* Obtain free SQ entry */
 	spin_lock_bh(&tgt->tgt_lock);
@@ -1147,7 +1147,7 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
 	BNX2FC_TGT_DBG(tgt, "Entered bnx2fc_eh_abort\n");
 
 	spin_lock_bh(&tgt->tgt_lock);
-	io_req = (struct bnx2fc_cmd *)sc_cmd->SCp.ptr;
+	io_req = bnx2fc_priv(sc_cmd)->io_req;
 	if (!io_req) {
 		/* Command might have just completed */
 		printk(KERN_ERR PFX "eh_abort: io_req is NULL\n");
@@ -1572,8 +1572,8 @@ void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
 		printk(KERN_ERR PFX "tmf's fc_hdr r_ctl = 0x%x\n",
 			fc_hdr->fh_r_ctl);
 	}
-	if (!sc_cmd->SCp.ptr) {
-		printk(KERN_ERR PFX "tm_compl: SCp.ptr is NULL\n");
+	if (!bnx2fc_priv(sc_cmd)->io_req) {
+		printk(KERN_ERR PFX "tm_compl: io_req is NULL\n");
 		return;
 	}
 	switch (io_req->fcp_status) {
@@ -1609,7 +1609,7 @@ void bnx2fc_process_tm_compl(struct bnx2fc_cmd *io_req,
 		return;
 	}
 
-	sc_cmd->SCp.ptr = NULL;
+	bnx2fc_priv(sc_cmd)->io_req = NULL;
 	scsi_done(sc_cmd);
 
 	kref_put(&io_req->refcount, bnx2fc_cmd_release);
@@ -1773,8 +1773,7 @@ static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req,
 		io_req->fcp_resid = fcp_rsp->fcp_resid;
 
 	io_req->scsi_comp_flags = rsp_flags;
-	CMD_SCSI_STATUS(sc_cmd) = io_req->cdb_status =
-				fcp_rsp->scsi_status_code;
+	io_req->cdb_status = fcp_rsp->scsi_status_code;
 
 	/* Fetch fcp_rsp_info and fcp_sns_info if available */
 	if (num_rq) {
@@ -1946,8 +1945,8 @@ void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
 	/* parse fcp_rsp and obtain sense data from RQ if available */
 	bnx2fc_parse_fcp_rsp(io_req, fcp_rsp, num_rq, rq_data);
 
-	if (!sc_cmd->SCp.ptr) {
-		printk(KERN_ERR PFX "SCp.ptr is NULL\n");
+	if (!bnx2fc_priv(sc_cmd)->io_req) {
+		printk(KERN_ERR PFX "io_req is NULL\n");
 		return;
 	}
 
@@ -2018,7 +2017,7 @@ void bnx2fc_process_scsi_cmd_compl(struct bnx2fc_cmd *io_req,
 			io_req->fcp_status);
 		break;
 	}
-	sc_cmd->SCp.ptr = NULL;
+	bnx2fc_priv(sc_cmd)->io_req = NULL;
 	scsi_done(sc_cmd);
 	kref_put(&io_req->refcount, bnx2fc_cmd_release);
 }
@@ -2044,7 +2043,7 @@ int bnx2fc_post_io_req(struct bnx2fc_rport *tgt,
 	io_req->port = port;
 	io_req->tgt = tgt;
 	io_req->data_xfer_len = scsi_bufflen(sc_cmd);
-	sc_cmd->SCp.ptr = (char *)io_req;
+	bnx2fc_priv(sc_cmd)->io_req = io_req;
 
 	stats = per_cpu_ptr(lport->stats, get_cpu());
 	if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {