From f05ec594fed6890d38bb8767676f626a4035ba55 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Sun, 9 Sep 2007 08:56:36 -0600 Subject: [PATCH] [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 Signed-off-by: James Bottomley --- drivers/scsi/advansys.c | 39 ++++++++++----------------------------- 1 file changed, 10 insertions(+), 29 deletions(-) diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c index d7bc0cf72134..ef4f6790a251 100644 --- a/drivers/scsi/advansys.c +++ b/drivers/scsi/advansys.c @@ -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 -- 2.20.1