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[SCSI] advansys: Support 16-byte commands properly 

The SCSI midlayer won't send commands greater than ->max_cmd_len.
So the checks on length in asc_build_req and adv_build_req are obsolete
and can be deleted, but also we have to set the max_cmd_len in
advansys_board_found().  Also move the length definitions together, and
write a helpful comment.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Matthew Wilcox 2007-09-09 08:56:36 -06:00 committed by James Bottomley
parent b2a7a4ba04
commit f05ec594fe
1 changed files with 10 additions and 29 deletions
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39
drivers/scsi/advansys.c
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@ -210,9 +210,15 @@ typedef unsigned char uchar;
#define ASC_SCSI_WIDTH_BIT_SET 0xFF
#define ASC_MAX_SENSE_LEN 32
#define ASC_MIN_SENSE_LEN 14
#define ASC_MAX_CDB_LEN 12
#define ASC_SCSI_RESET_HOLD_TIME_US 60
/*
* Narrow boards only support 12-byte commands, while wide boards
* extend to 16-byte commands.
*/
#define ASC_MAX_CDB_LEN 12
#define ADV_MAX_CDB_LEN 16
/*
* Inquiry SPC-2 SPI Byte 1 EVPD (Enable Vital Product Data)
* and CmdDt (Command Support Data) field bit definitions.
@ -1189,12 +1195,6 @@ static const char *advansys_info(struct Scsi_Host *shost);
#define ADV_CARRIER_COUNT (ASC_DEF_MAX_HOST_QNG + 15)
/*
* For wide boards a CDB length maximum of 16 bytes
* is supported.
*/
#define ADV_MAX_CDB_LEN 16
/*
* Define total number of simultaneous maximum element scatter-gather
* request blocks per wide adapter. ASC_DEF_MAX_HOST_QNG (253) is the
@ -3856,17 +3856,7 @@ static int asc_build_req(asc_board_t *boardp, struct scsi_cmnd *scp)
/*
* Build the ASC_SCSI_Q request.
*
* For narrow boards a CDB length maximum of 12 bytes
* is supported.
*/
if (scp->cmd_len > ASC_MAX_CDB_LEN) {
ASC_PRINT3("asc_build_req: board %d: cmd_len %d > "
"ASC_MAX_CDB_LEN %d\n", boardp->id, scp->cmd_len,
ASC_MAX_CDB_LEN);
scp->result = HOST_BYTE(DID_ERROR);
return ASC_ERROR;
}
asc_scsi_q.cdbptr = &scp->cmnd[0];
asc_scsi_q.q2.cdb_len = scp->cmd_len;
asc_scsi_q.q1.target_id = ASC_TID_TO_TARGET_ID(scp->device->id);
@ -4029,18 +4019,7 @@ adv_build_req(asc_board_t *boardp, struct scsi_cmnd *scp,
* Build the ADV_SCSI_REQ_Q request.
*/
/*
* Set CDB length and copy it to the request structure.
* For wide boards a CDB length maximum of 16 bytes
* is supported.
*/
if (scp->cmd_len > ADV_MAX_CDB_LEN) {
ASC_PRINT3
("adv_build_req: board %d: cmd_len %d > ADV_MAX_CDB_LEN %d\n",
boardp->id, scp->cmd_len, ADV_MAX_CDB_LEN);
scp->result = HOST_BYTE(DID_ERROR);
return ASC_ERROR;
}
/* Set CDB length and copy it to the request structure. */
scsiqp->cdb_len = scp->cmd_len;
/* Copy first 12 CDB bytes to cdb[]. */
for (i = 0; i < scp->cmd_len && i < 12; i++) {
@ -14834,6 +14813,7 @@ advansys_board_found(int iop, struct device *dev, int bus_type)
if (ASC_NARROW_BOARD(boardp)) {
shost->max_id = ASC_MAX_TID + 1;
shost->max_lun = ASC_MAX_LUN + 1;
shost->max_cmd_len = ASC_MAX_CDB_LEN;
shost->io_port = asc_dvc_varp->iop_base;
boardp->asc_n_io_port = ASC_IOADR_GAP;
@ -14844,6 +14824,7 @@ advansys_board_found(int iop, struct device *dev, int bus_type)
} else {
shost->max_id = ADV_MAX_TID + 1;
shost->max_lun = ADV_MAX_LUN + 1;
shost->max_cmd_len = ADV_MAX_CDB_LEN;
/*
* Save the I/O Port address and length even though