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[PATCH] libata: kill @cdb argument from xlat methods

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xlat function will be updated to consider qc->scsicmd->cmd_len and
many xlat functions deference qc->scsicmd already.  It doesn't make
sense to pass qc->scsicmd->cmnd as @cdb separately.  Kill the
argument.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-12-17 10:45:57 +09:00 committed by Jeff Garzik
parent 542b1444c5
commit ad706991f4
1 changed files with 13 additions and 17 deletions
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30
drivers/ata/libata-scsi.c
View file

@ -51,7 +51,7 @@
#define SECTOR_SIZE 512
typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *cdb);
typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
const struct scsi_device *scsidev);
@ -935,7 +935,6 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
/**
* ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
* @qc: Storage for translated ATA taskfile
* @cdb: SCSI command to translate
*
* Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
* (to start). Perhaps these commands should be preceded by
@ -948,11 +947,11 @@ int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
* RETURNS:
* Zero on success, non-zero on error.
*/
static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
const u8 *cdb)
static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *scmd = qc->scsicmd;
struct ata_taskfile *tf = &qc->tf;
const u8 *cdb = scmd->cmnd;
tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
tf->protocol = ATA_PROT_NODATA;
@ -1005,7 +1004,6 @@ invalid_fld:
/**
* ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
* @qc: Storage for translated ATA taskfile
* @cdb: SCSI command to translate (ignored)
*
* Sets up an ATA taskfile to issue FLUSH CACHE or
* FLUSH CACHE EXT.
@ -1016,7 +1014,7 @@ invalid_fld:
* RETURNS:
* Zero on success, non-zero on error.
*/
static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *cdb)
static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
{
struct ata_taskfile *tf = &qc->tf;
@ -1124,7 +1122,6 @@ static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
/**
* ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
* @qc: Storage for translated ATA taskfile
* @cdb: SCSI command to translate
*
* Converts SCSI VERIFY command to an ATA READ VERIFY command.
*
@ -1134,12 +1131,13 @@ static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
* RETURNS:
* Zero on success, non-zero on error.
*/
static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *cdb)
static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *scmd = qc->scsicmd;
struct ata_taskfile *tf = &qc->tf;
struct ata_device *dev = qc->dev;
u64 dev_sectors = qc->dev->n_sectors;
const u8 *cdb = scmd->cmnd;
u64 block;
u32 n_block;
@ -1242,7 +1240,6 @@ nothing_to_do:
/**
* ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
* @qc: Storage for translated ATA taskfile
* @cdb: SCSI command to translate
*
* Converts any of six SCSI read/write commands into the
* ATA counterpart, including starting sector (LBA),
@ -1258,9 +1255,10 @@ nothing_to_do:
* RETURNS:
* Zero on success, non-zero on error.
*/
static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *cdb)
static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *scmd = qc->scsicmd;
const u8 *cdb = scmd->cmnd;
unsigned int tf_flags = 0;
u64 block;
u32 n_block;
@ -1451,7 +1449,6 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
ata_xlat_func_t xlat_func)
{
struct ata_queued_cmd *qc;
u8 *cdb = cmd->cmnd;
int is_io = xlat_func == ata_scsi_rw_xlat;
VPRINTK("ENTER\n");
@ -1483,7 +1480,7 @@ static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
qc->complete_fn = ata_scsi_qc_complete;
if (xlat_func(qc, cdb))
if (xlat_func(qc))
goto early_finish;
/* select device, send command to hardware */
@ -2339,7 +2336,6 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc)
/**
* atapi_xlat - Initialize PACKET taskfile
* @qc: command structure to be initialized
* @cdb: SCSI CDB associated with this PACKET command
*
* LOCKING:
* spin_lock_irqsave(host lock)
@ -2347,7 +2343,7 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc)
* RETURNS:
* Zero on success, non-zero on failure.
*/
static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *cdb)
static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *scmd = qc->scsicmd;
struct ata_device *dev = qc->dev;
@ -2359,7 +2355,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *cdb)
if (ata_check_atapi_dma(qc))
using_pio = 1;
memcpy(&qc->cdb, cdb, dev->cdb_len);
memcpy(&qc->cdb, scmd->cmnd, dev->cdb_len);
qc->complete_fn = atapi_qc_complete;
@ -2511,18 +2507,18 @@ ata_scsi_map_proto(u8 byte1)
/**
* ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
* @qc: command structure to be initialized
* @cdb: SCSI command to convert
*
* Handles either 12 or 16-byte versions of the CDB.
*
* RETURNS:
* Zero on success, non-zero on failure.
*/
static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *cdb)
static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
{
struct ata_taskfile *tf = &(qc->tf);
struct scsi_cmnd *scmd = qc->scsicmd;
struct ata_device *dev = qc->dev;
const u8 *cdb = scmd->cmnd;
if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
goto invalid_fld;