[PATCH v4 38/50] scsi: nsp32: Stop using the SCSI pointer

Bart Van Assche
2022-02-16T21:04:26Z

Move the SCSI status field to private data. Stop setting the .ptr,
.this_residual, .buffer and .buffer_residual SCSI pointer members
since no code in this driver reads these members.

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

Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Masanori Goto <gotom@debian.or.jp>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/nsp32.c | 20 +++++++-------------
drivers/scsi/nsp32.h | 9 +++++++++
2 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/drivers/scsi/nsp32.c b/drivers/scsi/nsp32.c
index bd3ee3bf08ee..75bb0028ed74 100644
--- a/drivers/scsi/nsp32.c
+++ b/drivers/scsi/nsp32.c
@@ -273,6 +273,7 @@ static struct scsi_host_template nsp32_template = {
.eh_abort_handler = nsp32_eh_abort,
.eh_host_reset_handler = nsp32_eh_host_reset,
/* .highmem_io = 1, */
+ .cmd_size = sizeof(struct nsp32_cmd_priv),
};

#include "nsp32_io.h"
@@ -946,14 +947,9 @@ static int nsp32_queuecommand_lck(struct scsi_cmnd *SCpnt)
show_command(SCpnt);

data->CurrentSC = SCpnt;
- SCpnt->SCp.Status = SAM_STAT_CHECK_CONDITION;
+ nsp32_priv(SCpnt)->status = SAM_STAT_CHECK_CONDITION;
scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));

- SCpnt->SCp.ptr = (char *)scsi_sglist(SCpnt);
- SCpnt->SCp.this_residual = scsi_bufflen(SCpnt);
- SCpnt->SCp.buffer = NULL;
- SCpnt->SCp.buffers_residual = 0;
-
/* initialize data */
data->msgout_len = 0;
data->msgin_len = 0;
@@ -1376,7 +1372,7 @@ static irqreturn_t do_nsp32_isr(int irq, void *dev_id)
case BUSPHASE_STATUS:
nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status");

- SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
+ nsp32_priv(SCpnt)->status = nsp32_read1(base, SCSI_CSB_IN);

break;
default:
@@ -1687,18 +1683,18 @@ static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
/* MsgIn 00: Command Complete */
nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete");

- SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
+ nsp32_priv(SCpnt)->status = nsp32_read1(base, SCSI_CSB_IN);
nsp32_dbg(NSP32_DEBUG_BUSFREE,
"normal end stat=0x%x resid=0x%x\n",
- SCpnt->SCp.Status, scsi_get_resid(SCpnt));
+ nsp32_priv(SCpnt)->status, scsi_get_resid(SCpnt));
SCpnt->result = (DID_OK << 16) |
- (SCpnt->SCp.Status << 0);
+ (nsp32_priv(SCpnt)->status << 0);
nsp32_scsi_done(SCpnt);
/* All operation is done */
return TRUE;
} else if (execph & MSGIN_04_VALID) {
/* MsgIn 04: Disconnect */
- SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
+ nsp32_priv(SCpnt)->status = nsp32_read1(base, SCSI_CSB_IN);

nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
return TRUE;
@@ -1706,8 +1702,6 @@ static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
/* Unexpected bus free */
nsp32_msg(KERN_WARNING, "unexpected bus free occurred");

- /* DID_ERROR? */
- //SCpnt->result = (DID_OK << 16) | (SCpnt->SCp.Status << 0);
SCpnt->result = DID_ERROR << 16;
nsp32_scsi_done(SCpnt);
return TRUE;
diff --git a/drivers/scsi/nsp32.h b/drivers/scsi/nsp32.h
index ab0726c070f7..924889f8bd37 100644
--- a/drivers/scsi/nsp32.h
+++ b/drivers/scsi/nsp32.h
@@ -534,6 +534,15 @@ typedef struct _nsp32_sync_table {
---PERIOD-- ---OFFSET-- */
#define TO_SYNCREG(period, offset) (((period) & 0x0f) << 4 | ((offset) & 0x0f))

+struct nsp32_cmd_priv {
+ enum sam_status status;
+};
+
+static inline struct nsp32_cmd_priv *nsp32_priv(struct scsi_cmnd *cmd)
+{
+ return scsi_cmd_priv(cmd);
+}
+
typedef struct _nsp32_target {
unsigned char syncreg; /* value for SYNCREG */
unsigned char ackwidth; /* value for ACKWIDTH */