From 2b9efba48283f34083df6bc53f6752fba4e4d409 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Mon, 13 Oct 2008 21:39:31 +0200 Subject: [PATCH] ide: add pointer to the current packet command to ide_drive_t * Add pointer to the current packet command (struct ide_atapi_pc *pc) to ide_drive_t and use it instead of the pointer in struct ide_*_obj. * Use drive->pc in ide_{issue,transfer}_pc() and ide_pc_intr() instead of 'pc' argument. There should be no functional changes caused by this patch. Cc: Borislav Petkov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-atapi.c | 9 +++++--- drivers/ide/ide-floppy.c | 20 +++++++---------- drivers/ide/ide-floppy.h | 2 -- drivers/ide/ide-tape.c | 31 +++++++++----------------- drivers/scsi/ide-scsi.c | 58 +++++++++++++++++++++++------------------------- include/linux/ide.h | 10 ++++++--- 6 files changed, 60 insertions(+), 70 deletions(-) diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c index fb27c94..0069c4f 100644 --- a/drivers/ide/ide-atapi.c +++ b/drivers/ide/ide-atapi.c @@ -204,12 +204,13 @@ int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on) EXPORT_SYMBOL_GPL(ide_set_media_lock); /* TODO: unify the code thus making some arguments go away */ -ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc, +ide_startstop_t ide_pc_intr(ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry, void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *), void (*retry_pc)(ide_drive_t *), int (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned, int)) { + struct ide_atapi_pc *pc = drive->pc; ide_hwif_t *hwif = drive->hwif; struct request *rq = hwif->hwgroup->rq; const struct ide_tp_ops *tp_ops = hwif->tp_ops; @@ -416,10 +417,11 @@ static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason) return ireason; } -ide_startstop_t ide_transfer_pc(ide_drive_t *drive, struct ide_atapi_pc *pc, +ide_startstop_t ide_transfer_pc(ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry) { + struct ide_atapi_pc *pc = drive->pc; ide_hwif_t *hwif = drive->hwif; struct request *rq = hwif->hwgroup->rq; ide_startstop_t startstop; @@ -458,10 +460,11 @@ ide_startstop_t ide_transfer_pc(ide_drive_t *drive, struct ide_atapi_pc *pc, } EXPORT_SYMBOL_GPL(ide_transfer_pc); -ide_startstop_t ide_issue_pc(ide_drive_t *drive, struct ide_atapi_pc *pc, +ide_startstop_t ide_issue_pc(ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry) { + struct ide_atapi_pc *pc = drive->pc; ide_hwif_t *hwif = drive->hwif; u16 bcount; u8 dma = 0; diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c index b330806..cb89caf 100644 --- a/drivers/ide/ide-floppy.c +++ b/drivers/ide/ide-floppy.c @@ -159,7 +159,7 @@ static void idefloppy_update_buffers(ide_drive_t *drive, static void ide_floppy_callback(ide_drive_t *drive, int dsc) { idefloppy_floppy_t *floppy = drive->driver_data; - struct ide_atapi_pc *pc = floppy->pc; + struct ide_atapi_pc *pc = drive->pc; int uptodate = pc->error ? 0 : 1; debug_log("Reached %s\n", __func__); @@ -171,7 +171,7 @@ static void ide_floppy_callback(ide_drive_t *drive, int dsc) (pc->rq && blk_pc_request(pc->rq))) uptodate = 1; /* FIXME */ else if (pc->c[0] == GPCMD_REQUEST_SENSE) { - u8 *buf = floppy->pc->buf; + u8 *buf = pc->buf; if (!pc->error) { floppy->sense_key = buf[2] & 0x0F; @@ -219,9 +219,7 @@ static void idefloppy_retry_pc(ide_drive_t *drive) /* The usual interrupt handler called during a packet command. */ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) { - idefloppy_floppy_t *floppy = drive->driver_data; - - return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr, + return ide_pc_intr(drive, idefloppy_pc_intr, WAIT_FLOPPY_CMD, NULL, idefloppy_update_buffers, idefloppy_retry_pc, ide_io_buffers); } @@ -234,10 +232,8 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) */ static int idefloppy_transfer_pc(ide_drive_t *drive) { - idefloppy_floppy_t *floppy = drive->driver_data; - /* Send the actual packet */ - drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12); + drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); /* Timeout for the packet command */ return WAIT_FLOPPY_CMD; @@ -251,7 +247,6 @@ static int idefloppy_transfer_pc(ide_drive_t *drive) static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; - struct ide_atapi_pc *pc = floppy->pc; ide_expiry_t *expiry; unsigned int timeout; @@ -271,7 +266,7 @@ static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive) expiry = NULL; } - return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry); + return ide_transfer_pc(drive, idefloppy_pc_intr, timeout, expiry); } static void ide_floppy_report_error(idefloppy_floppy_t *floppy, @@ -298,8 +293,9 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, if (floppy->failed_pc == NULL && pc->c[0] != GPCMD_REQUEST_SENSE) floppy->failed_pc = pc; + /* Set the current packet command */ - floppy->pc = pc; + drive->pc = pc; if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) @@ -316,7 +312,7 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, pc->retries++; - return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer, + return ide_issue_pc(drive, idefloppy_start_pc_transfer, WAIT_FLOPPY_CMD, NULL); } diff --git a/drivers/ide/ide-floppy.h b/drivers/ide/ide-floppy.h index ecadc2b..6eee8d3 100644 --- a/drivers/ide/ide-floppy.h +++ b/drivers/ide/ide-floppy.h @@ -13,8 +13,6 @@ typedef struct ide_floppy_obj { struct kref kref; unsigned int openers; /* protected by BKL for now */ - /* Current packet command */ - struct ide_atapi_pc *pc; /* Last failed packet command */ struct ide_atapi_pc *failed_pc; /* used for blk_{fs,pc}_request() requests */ diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c index 70b499a..5b2ac04 100644 --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -172,15 +172,11 @@ typedef struct ide_tape_obj { struct kref kref; /* - * pc points to the current processed packet command. - * * failed_pc points to the last failed packet command, or contains * NULL if we do not need to retry any packet command. This is * required since an additional packet command is needed before the * retry, to get detailed information on what went wrong. */ - /* Current packet command */ - struct ide_atapi_pc *pc; /* Last failed packet command */ struct ide_atapi_pc *failed_pc; /* used by REQ_IDETAPE_{READ,WRITE} requests */ @@ -527,7 +523,7 @@ static void ide_tape_handle_dsc(ide_drive_t *); static void ide_tape_callback(ide_drive_t *drive, int dsc) { idetape_tape_t *tape = drive->driver_data; - struct ide_atapi_pc *pc = tape->pc; + struct ide_atapi_pc *pc = drive->pc; int uptodate = pc->error ? 0 : 1; debug_log(DBG_PROCS, "Enter %s\n", __func__); @@ -563,7 +559,7 @@ static void ide_tape_callback(ide_drive_t *drive, int dsc) if (pc->error) uptodate = pc->error; } else if (pc->c[0] == READ_POSITION && uptodate) { - u8 *readpos = tape->pc->buf; + u8 *readpos = pc->buf; debug_log(DBG_SENSE, "BOP - %s\n", (readpos[0] & 0x80) ? "Yes" : "No"); @@ -659,9 +655,7 @@ static int ide_tape_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, */ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive) { - idetape_tape_t *tape = drive->driver_data; - - return ide_pc_intr(drive, tape->pc, idetape_pc_intr, WAIT_TAPE_CMD, + return ide_pc_intr(drive, idetape_pc_intr, WAIT_TAPE_CMD, NULL, idetape_update_buffers, idetape_retry_pc, ide_tape_io_buffers); } @@ -669,7 +663,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive) /* * Packet Command Interface * - * The current Packet Command is available in tape->pc, and will not change + * The current Packet Command is available in drive->pc, and will not change * until we finish handling it. Each packet command is associated with a * callback function that will be called when the command is finished. * @@ -704,10 +698,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive) */ static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive) { - idetape_tape_t *tape = drive->driver_data; - - return ide_transfer_pc(drive, tape->pc, idetape_pc_intr, - WAIT_TAPE_CMD, NULL); + return ide_transfer_pc(drive, idetape_pc_intr, WAIT_TAPE_CMD, NULL); } static ide_startstop_t idetape_issue_pc(ide_drive_t *drive, @@ -715,7 +706,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive, { idetape_tape_t *tape = drive->driver_data; - if (tape->pc->c[0] == REQUEST_SENSE && + if (drive->pc->c[0] == REQUEST_SENSE && pc->c[0] == REQUEST_SENSE) { printk(KERN_ERR "ide-tape: possible ide-tape.c bug - " "Two request sense in serial were issued\n"); @@ -723,8 +714,9 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive, if (tape->failed_pc == NULL && pc->c[0] != REQUEST_SENSE) tape->failed_pc = pc; + /* Set the current packet command */ - tape->pc = pc; + drive->pc = pc; if (pc->retries > IDETAPE_MAX_PC_RETRIES || (pc->flags & PC_FLAG_ABORT)) { @@ -755,8 +747,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive, pc->retries++; - return ide_issue_pc(drive, pc, idetape_transfer_pc, - WAIT_TAPE_CMD, NULL); + return ide_issue_pc(drive, idetape_transfer_pc, WAIT_TAPE_CMD, NULL); } /* A mode sense command is used to "sense" tape parameters. */ @@ -790,7 +781,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; idetape_tape_t *tape = drive->driver_data; - struct ide_atapi_pc *pc = tape->pc; + struct ide_atapi_pc *pc = drive->pc; u8 stat; stat = hwif->tp_ops->read_status(hwif); @@ -867,7 +858,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive, } /* Retry a failed packet command */ - if (tape->failed_pc && tape->pc->c[0] == REQUEST_SENSE) { + if (tape->failed_pc && drive->pc->c[0] == REQUEST_SENSE) { pc = tape->failed_pc; goto out; } diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c index b9bfec2..bb8b3b1 100644 --- a/drivers/scsi/ide-scsi.c +++ b/drivers/scsi/ide-scsi.c @@ -82,7 +82,6 @@ typedef struct ide_scsi_obj { struct gendisk *disk; struct Scsi_Host *host; - struct ide_atapi_pc *pc; /* Current packet command */ unsigned long transform; /* SCSI cmd translation layer */ unsigned long log; /* log flags */ } idescsi_scsi_t; @@ -140,7 +139,7 @@ static int idescsi_end_request(ide_drive_t *, int, int); static void ide_scsi_callback(ide_drive_t *drive, int dsc) { idescsi_scsi_t *scsi = drive_to_idescsi(drive); - struct ide_atapi_pc *pc = scsi->pc; + struct ide_atapi_pc *pc = drive->pc; if (pc->flags & PC_FLAG_TIMEDOUT) debug_log("%s: got timed out packet %lu at %lu\n", __func__, @@ -267,7 +266,7 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs) spin_unlock_irqrestore(host->host_lock, flags); kfree(pc); blk_put_request(rq); - scsi->pc = NULL; + drive->pc = NULL; return 0; } @@ -278,8 +277,7 @@ static inline unsigned long get_timeout(struct ide_atapi_pc *pc) static int idescsi_expiry(ide_drive_t *drive) { - idescsi_scsi_t *scsi = drive_to_idescsi(drive); - struct ide_atapi_pc *pc = scsi->pc; + struct ide_atapi_pc *pc = drive->pc; debug_log("%s called for %lu at %lu\n", __func__, pc->scsi_cmd->serial_number, jiffies); @@ -294,19 +292,14 @@ static int idescsi_expiry(ide_drive_t *drive) */ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive) { - idescsi_scsi_t *scsi = drive_to_idescsi(drive); - struct ide_atapi_pc *pc = scsi->pc; - - return ide_pc_intr(drive, pc, idescsi_pc_intr, get_timeout(pc), + return ide_pc_intr(drive, idescsi_pc_intr, get_timeout(drive->pc), idescsi_expiry, NULL, NULL, ide_io_buffers); } static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive) { - idescsi_scsi_t *scsi = drive_to_idescsi(drive); - - return ide_transfer_pc(drive, scsi->pc, idescsi_pc_intr, - get_timeout(scsi->pc), idescsi_expiry); + return ide_transfer_pc(drive, idescsi_pc_intr, + get_timeout(drive->pc), idescsi_expiry); } static inline int idescsi_set_direction(struct ide_atapi_pc *pc) @@ -351,12 +344,10 @@ static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc) static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive, struct ide_atapi_pc *pc) { - idescsi_scsi_t *scsi = drive_to_idescsi(drive); - /* Set the current packet command */ - scsi->pc = pc; + drive->pc = pc; - return ide_issue_pc(drive, pc, idescsi_transfer_pc, + return ide_issue_pc(drive, idescsi_transfer_pc, get_timeout(pc), idescsi_expiry); } @@ -621,6 +612,8 @@ static int idescsi_eh_abort (struct scsi_cmnd *cmd) int busy; int ret = FAILED; + struct ide_atapi_pc *pc; + /* In idescsi_eh_abort we try to gently pry our command from the ide subsystem */ if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) @@ -641,26 +634,27 @@ static int idescsi_eh_abort (struct scsi_cmnd *cmd) spin_lock_irq(&ide_lock); /* If there is no pc running we're done (our interrupt took care of it) */ - if (!scsi->pc) { + pc = drive->pc; + if (pc == NULL) { ret = SUCCESS; goto ide_unlock; } /* It's somewhere in flight. Does ide subsystem agree? */ - if (scsi->pc->scsi_cmd->serial_number == cmd->serial_number && !busy && - elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != scsi->pc->rq) { + if (pc->scsi_cmd->serial_number == cmd->serial_number && !busy && + elv_queue_empty(drive->queue) && HWGROUP(drive)->rq != pc->rq) { /* * FIXME - not sure this condition can ever occur */ printk (KERN_ERR "ide-scsi: cmd aborted!\n"); - if (blk_sense_request(scsi->pc->rq)) - kfree(scsi->pc->buf); + if (blk_sense_request(pc->rq)) + kfree(pc->buf); /* we need to call blk_put_request twice. */ - blk_put_request(scsi->pc->rq); - blk_put_request(scsi->pc->rq); - kfree(scsi->pc); - scsi->pc = NULL; + blk_put_request(pc->rq); + blk_put_request(pc->rq); + kfree(pc); + drive->pc = NULL; ret = SUCCESS; } @@ -682,6 +676,8 @@ static int idescsi_eh_reset (struct scsi_cmnd *cmd) int ready = 0; int ret = SUCCESS; + struct ide_atapi_pc *pc; + /* In idescsi_eh_reset we forcefully remove the command from the ide subsystem and reset the device. */ if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) @@ -696,7 +692,9 @@ static int idescsi_eh_reset (struct scsi_cmnd *cmd) spin_lock_irq(cmd->device->host->host_lock); spin_lock(&ide_lock); - if (!scsi->pc || (req = scsi->pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { + pc = drive->pc; + + if (pc == NULL || (req = pc->rq) != HWGROUP(drive)->rq || !HWGROUP(drive)->handler) { printk (KERN_WARNING "ide-scsi: No active request in idescsi_eh_reset\n"); spin_unlock(&ide_lock); spin_unlock_irq(cmd->device->host->host_lock); @@ -707,9 +705,9 @@ static int idescsi_eh_reset (struct scsi_cmnd *cmd) if (__blk_end_request(req, -EIO, 0)) BUG(); if (blk_sense_request(req)) - kfree(scsi->pc->buf); - kfree(scsi->pc); - scsi->pc = NULL; + kfree(pc->buf); + kfree(pc); + drive->pc = NULL; blk_put_request(req); /* now nuke the drive queue */ diff --git a/include/linux/ide.h b/include/linux/ide.h index 93fd2bc..98d29df 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -322,6 +322,7 @@ typedef enum { ide_started, /* a drive operation was started, handler was set */ } ide_startstop_t; +struct ide_atapi_pc; struct ide_devset; struct ide_driver_s; @@ -484,6 +485,9 @@ struct ide_drive_s { struct device gendev; struct completion gendev_rel_comp; /* to deal with device release() */ + /* current packet command */ + struct ide_atapi_pc *pc; + /* callback for packet commands */ void (*pc_callback)(struct ide_drive_s *, int); @@ -1171,15 +1175,15 @@ int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *); int ide_do_start_stop(ide_drive_t *, struct gendisk *, int); int ide_set_media_lock(ide_drive_t *, struct gendisk *, int); -ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc, +ide_startstop_t ide_pc_intr(ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry, void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *), void (*retry_pc)(ide_drive_t *), int (*io_buffers)(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int)); -ide_startstop_t ide_transfer_pc(ide_drive_t *, struct ide_atapi_pc *, +ide_startstop_t ide_transfer_pc(ide_drive_t *, ide_handler_t *, unsigned int, ide_expiry_t *); -ide_startstop_t ide_issue_pc(ide_drive_t *, struct ide_atapi_pc *, +ide_startstop_t ide_issue_pc(ide_drive_t *, ide_handler_t *, unsigned int, ide_expiry_t *); ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *); -- 2.7.4