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Commit ad3cadda authored by Jens Axboe's avatar Jens Axboe Committed by Jens Axboe
Browse files

[PATCH] Get rid of struct request request_pm_state member 



The IDE power management can just use the ->end_io_data member to store
it's data.

Signed-off-by: default avatarJens Axboe <axboe@suse.de>
parent b31dc66a

drivers/ide/ide-io.c

+52 −39
Original line number Diff line number Diff line
@@ -142,38 +142,41 @@ enum { 


static void ide_complete_power_step(ide_drive_t *drive, struct request *rq, u8 stat, u8 error)

{

	struct request_pm_state *pm = rq->end_io_data;



	if (drive->media != ide_disk)

		return;



	switch (rq->pm->pm_step) {

	switch (pm->pm_step) {

	case ide_pm_flush_cache:	/* Suspend step 1 (flush cache) complete */

		if (rq->pm->pm_state == PM_EVENT_FREEZE)

			rq->pm->pm_step = ide_pm_state_completed;

		if (pm->pm_state == PM_EVENT_FREEZE)

			pm->pm_step = ide_pm_state_completed;

		else

			rq->pm->pm_step = idedisk_pm_standby;

			pm->pm_step = idedisk_pm_standby;

		break;

	case idedisk_pm_standby:	/* Suspend step 2 (standby) complete */

		rq->pm->pm_step = ide_pm_state_completed;

		pm->pm_step = ide_pm_state_completed;

		break;

	case idedisk_pm_idle:		/* Resume step 1 (idle) complete */

		rq->pm->pm_step = ide_pm_restore_dma;

		pm->pm_step = ide_pm_restore_dma;

		break;

	}

}



static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)

{

	struct request_pm_state *pm = rq->end_io_data;

	ide_task_t *args = rq->special;



	memset(args, 0, sizeof(*args));



	if (drive->media != ide_disk) {

		/* skip idedisk_pm_idle for ATAPI devices */

		if (rq->pm->pm_step == idedisk_pm_idle)

			rq->pm->pm_step = ide_pm_restore_dma;

		if (pm->pm_step == idedisk_pm_idle)

			pm->pm_step = ide_pm_restore_dma;

	}



	switch (rq->pm->pm_step) {

	switch (pm->pm_step) {

	case ide_pm_flush_cache:	/* Suspend step 1 (flush cache) */

		if (drive->media != ide_disk)

			break;
@@ -215,7 +218,7 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request * 
		drive->hwif->ide_dma_check(drive);

		break;

	}

	rq->pm->pm_step = ide_pm_state_completed;

	pm->pm_step = ide_pm_state_completed;

	return ide_stopped;

}
@@ -362,12 +365,13 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err) 
			}

		}

	} else if (blk_pm_request(rq)) {

		struct request_pm_state *pm = rq->end_io_data;

#ifdef DEBUG_PM

		printk("%s: complete_power_step(step: %d, stat: %x, err: %x)\n",

			drive->name, rq->pm->pm_step, stat, err);

#endif

		ide_complete_power_step(drive, rq, stat, err);

		if (rq->pm->pm_step == ide_pm_state_completed)

		if (pm->pm_step == ide_pm_state_completed)

			ide_complete_pm_request(drive, rq);

		return;

	}
@@ -871,6 +875,39 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive, 
 	return ide_stopped;

}



static void ide_check_pm_state(ide_drive_t *drive, struct request *rq)

{

	struct request_pm_state *pm = rq->end_io_data;



	if (blk_pm_suspend_request(rq) &&

	    pm->pm_step == ide_pm_state_start_suspend)

		/* Mark drive blocked when starting the suspend sequence. */

		drive->blocked = 1;

	else if (blk_pm_resume_request(rq) &&

		 pm->pm_step == ide_pm_state_start_resume) {

		/* 

		 * The first thing we do on wakeup is to wait for BSY bit to

		 * go away (with a looong timeout) as a drive on this hwif may

		 * just be POSTing itself.

		 * We do that before even selecting as the "other" device on

		 * the bus may be broken enough to walk on our toes at this

		 * point.

		 */

		int rc;

#ifdef DEBUG_PM

		printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);

#endif

		rc = ide_wait_not_busy(HWIF(drive), 35000);

		if (rc)

			printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);

		SELECT_DRIVE(drive);

		HWIF(drive)->OUTB(8, HWIF(drive)->io_ports[IDE_CONTROL_OFFSET]);

		rc = ide_wait_not_busy(HWIF(drive), 10000);

		if (rc)

			printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);

	}

}



/**

 *	start_request	-	start of I/O and command issuing for IDE

 *
@@ -909,33 +946,8 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq) 
	if (block == 0 && drive->remap_0_to_1 == 1)

		block = 1;  /* redirect MBR access to EZ-Drive partn table */



	if (blk_pm_suspend_request(rq) &&

	    rq->pm->pm_step == ide_pm_state_start_suspend)

		/* Mark drive blocked when starting the suspend sequence. */

		drive->blocked = 1;

	else if (blk_pm_resume_request(rq) &&

		 rq->pm->pm_step == ide_pm_state_start_resume) {

		/* 

		 * The first thing we do on wakeup is to wait for BSY bit to

		 * go away (with a looong timeout) as a drive on this hwif may

		 * just be POSTing itself.

		 * We do that before even selecting as the "other" device on

		 * the bus may be broken enough to walk on our toes at this

		 * point.

		 */

		int rc;

#ifdef DEBUG_PM

		printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);

#endif

		rc = ide_wait_not_busy(HWIF(drive), 35000);

		if (rc)

			printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);

		SELECT_DRIVE(drive);

		HWIF(drive)->OUTB(8, HWIF(drive)->io_ports[IDE_CONTROL_OFFSET]);

		rc = ide_wait_not_busy(HWIF(drive), 10000);

		if (rc)

			printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);

	}

	if (blk_pm_request(rq))

		ide_check_pm_state(drive, rq);



	SELECT_DRIVE(drive);

	if (ide_wait_stat(&startstop, drive, drive->ready_stat, BUSY_STAT|DRQ_STAT, WAIT_READY)) {
@@ -950,13 +962,14 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq) 
		else if (rq->flags & REQ_DRIVE_TASKFILE)

			return execute_drive_cmd(drive, rq);

		else if (blk_pm_request(rq)) {

			struct request_pm_state *pm = rq->end_io_data;

#ifdef DEBUG_PM

			printk("%s: start_power_step(step: %d)\n",

				drive->name, rq->pm->pm_step);

#endif

			startstop = ide_start_power_step(drive, rq);

			if (startstop == ide_stopped &&

			    rq->pm->pm_step == ide_pm_state_completed)

			    pm->pm_step == ide_pm_state_completed)

				ide_complete_pm_request(drive, rq);

			return startstop;

		}

drivers/ide/ide.c

+2 −2
Original line number Diff line number Diff line
@@ -1226,7 +1226,7 @@ static int generic_ide_suspend(struct device *dev, pm_message_t state) 
	memset(&args, 0, sizeof(args));

	rq.flags = REQ_PM_SUSPEND;

	rq.special = &args;

	rq.pm = &rqpm;

	rq.end_io_data = &rqpm;

	rqpm.pm_step = ide_pm_state_start_suspend;

	rqpm.pm_state = state.event;
@@ -1245,7 +1245,7 @@ static int generic_ide_resume(struct device *dev) 
	memset(&args, 0, sizeof(args));

	rq.flags = REQ_PM_RESUME;

	rq.special = &args;

	rq.pm = &rqpm;

	rq.end_io_data = &rqpm;

	rqpm.pm_step = ide_pm_state_start_resume;

	rqpm.pm_state = PM_EVENT_ON;

include/linux/blkdev.h

+0 −5
Original line number Diff line number Diff line
@@ -195,11 +195,6 @@ struct request { 
	unsigned int timeout;

	int retries;



	/*

	 * For Power Management requests

	 */

	struct request_pm_state *pm;



	/*

	 * completion callback. end_io_data should be folded in with waiting

	 */