ide-floppy: remove atomic test_*bit macros

..and replace them with flag enums.

Bart:
- fix idefloppy_media_changed() return value
Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-floppy.c

@@ -104,15 +104,19 @@ typedef struct idefloppy_packet_command_s {
 	unsigned long flags;			/* Status/Action bit flags: long for set_bit */
 } idefloppy_pc_t;
 
-/*
- *	Packet command flag bits.
- */
-#define PC_DMA_RECOMMENDED		2	/* 1 when we prefer to use DMA if possible */
-#define	PC_DMA_IN_PROGRESS		3	/* 1 while DMA in progress */
-#define	PC_DMA_ERROR			4	/* 1 when encountered problem during DMA */
-#define	PC_WRITING			5	/* Data direction */
-
-#define	PC_SUPPRESS_ERROR		6	/* Suppress error reporting */
+/* Packet command flag bits. */
+enum {
+	/* 1 when we prefer to use DMA if possible */
+	PC_FLAG_DMA_RECOMMENDED	= (1 << 0),
+	/* 1 while DMA in progress */
+	PC_FLAG_DMA_IN_PROGRESS	= (1 << 1),
+	/* 1 when encountered problem during DMA */
+	PC_FLAG_DMA_ERROR	= (1 << 2),
+	/* Data direction */
+	PC_FLAG_WRITING		= (1 << 3),
+	/* Suppress error reporting */
+	PC_FLAG_SUPPRESS_ERROR	= (1 << 4),
+};
 
 /* format capacities descriptor codes */
 #define CAPACITY_INVALID	0x00
@@ -171,14 +175,19 @@ typedef struct ide_floppy_obj {
 
 #define IDEFLOPPY_TICKS_DELAY	HZ/20	/* default delay for ZIP 100 (50ms) */
 
-/*
- *	Floppy flag bits values.
- */
-#define IDEFLOPPY_DRQ_INTERRUPT		0	/* DRQ interrupt device */
-#define IDEFLOPPY_MEDIA_CHANGED		1	/* Media may have changed */
-#define	IDEFLOPPY_FORMAT_IN_PROGRESS	3	/* Format in progress */
-#define IDEFLOPPY_CLIK_DRIVE	        4       /* Avoid commands not supported in Clik drive */
-#define IDEFLOPPY_ZIP_DRIVE		5	/* Requires BH algorithm for packets */
+/* Floppy flag bits values. */
+enum {
+	/* DRQ interrupt device */
+	IDEFLOPPY_FLAG_DRQ_INTERRUPT		= (1 <<	0),
+	/* Media may have changed */
+	IDEFLOPPY_FLAG_MEDIA_CHANGED		= (1 << 1),
+	/* Format in progress */
+	IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS	= (1 << 2),
+	/* Avoid commands not supported in Clik drive */
+	IDEFLOPPY_FLAG_CLIK_DRIVE		= (1 << 3),
+	/* Requires BH algorithm for packets */
+	IDEFLOPPY_FLAG_ZIP_DRIVE		= (1 << 4),
+};
 
 /*
  *	Defines for the mode sense command
@@ -503,12 +512,12 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 
 	debug_log("Reached %s interrupt handler\n", __func__);
 
-	if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
+	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
 		dma_error = hwif->ide_dma_end(drive);
 		if (dma_error) {
 			printk(KERN_ERR "%s: DMA %s error\n", drive->name,
 					rq_data_dir(rq) ? "write" : "read");
-			set_bit(PC_DMA_ERROR, &pc->flags);
+			pc->flags |= PC_FLAG_DMA_ERROR;
 		} else {
 			pc->actually_transferred = pc->request_transfer;
 			idefloppy_update_buffers(drive, pc);
@@ -522,11 +531,11 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	if ((stat & DRQ_STAT) == 0) {		/* No more interrupts */
 		debug_log("Packet command completed, %d bytes transferred\n",
 				pc->actually_transferred);
-		clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
+		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 
 		local_irq_enable_in_hardirq();
 
-		if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
+		if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
 			/* Error detected */
 			debug_log("%s: I/O error\n", drive->name);
 			rq->errors++;
@@ -548,7 +557,8 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 		return ide_stopped;
 	}
 
-	if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
+	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
+		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 		printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 			"more interrupts in DMA mode\n");
 		ide_dma_off(drive);
@@ -565,7 +575,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 		printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 		return ide_do_reset(drive);
 	}
-	if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
+	if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
 		/* Hopefully, we will never get here */
 		printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 				(ireason & IO) ? "Write" : "Read");
@@ -573,7 +583,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 				(ireason & IO) ? "Read" : "Write");
 		return ide_do_reset(drive);
 	}
-	if (!test_bit(PC_WRITING, &pc->flags)) {
+	if (!(pc->flags & PC_FLAG_WRITING)) {
 		/* Reading - Check that we have enough space */
 		temp = pc->actually_transferred + bcount;
 		if (temp > pc->request_transfer) {
@@ -593,7 +603,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 					" expected - allowing transfer\n");
 		}
 	}
-	if (test_bit(PC_WRITING, &pc->flags))
+	if (pc->flags & PC_FLAG_WRITING)
 		xferfunc = hwif->atapi_output_bytes;
 	else
 		xferfunc = hwif->atapi_input_bytes;
@@ -602,7 +612,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 		xferfunc(drive, pc->current_position, bcount);
 	else
 		ide_floppy_io_buffers(drive, pc, bcount,
-				      test_bit(PC_WRITING, &pc->flags));
+				      !!(pc->flags & PC_FLAG_WRITING));
 
 	/* Update the current position */
 	pc->actually_transferred += bcount;
@@ -733,7 +743,7 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 	floppy->pc = pc;
 
 	if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
-		if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags))
+		if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 			ide_floppy_report_error(floppy, pc);
 		/* Giving up */
 		pc->error = IDEFLOPPY_ERROR_GENERAL;
@@ -751,24 +761,25 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 	pc->current_position = pc->buffer;
 	bcount = min(pc->request_transfer, 63 * 1024);
 
-	if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
+	if (pc->flags & PC_FLAG_DMA_ERROR) {
+		pc->flags &= ~PC_FLAG_DMA_ERROR;
 		ide_dma_off(drive);
-
+	}
 	dma = 0;
 
-	if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
+	if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
 		dma = !hwif->dma_setup(drive);
 
 	ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 			   IDE_TFLAG_OUT_DEVICE, bcount, dma);
 
 	if (dma) {	/* Begin DMA, if necessary */
-		set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
+		pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
 		hwif->dma_start(drive);
 	}
 
 	/* Can we transfer the packet when we get the interrupt or wait? */
-	if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
+	if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
 		/* wait */
 		pkt_xfer_routine = &idefloppy_transfer_pc1;
 	} else {
@@ -776,7 +787,7 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 		pkt_xfer_routine = &idefloppy_transfer_pc;
 	}
 	
-	if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
+	if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
 		/* Issue the packet command */
 		ide_execute_command(drive, WIN_PACKETCMD,
 				pkt_xfer_routine,
@@ -834,7 +845,7 @@ static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
 	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
 	pc->buffer_size=12;
-	set_bit(PC_WRITING, &pc->flags);
+	pc->flags |= PC_FLAG_WRITING;
 }
 
 /*
@@ -897,10 +908,10 @@ static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 	pc->rq = rq;
 	pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 	if (rq->cmd_flags & REQ_RW)
-		set_bit(PC_WRITING, &pc->flags);
+		pc->flags |= PC_FLAG_WRITING;
 	pc->buffer = NULL;
 	pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
-	set_bit(PC_DMA_RECOMMENDED, &pc->flags);
+	pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 }
 
 static void
@@ -912,11 +923,10 @@ idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct req
 	pc->rq = rq;
 	pc->b_count = rq->data_len;
 	if (rq->data_len && rq_data_dir(rq) == WRITE)
-		set_bit(PC_WRITING, &pc->flags);
+		pc->flags |= PC_FLAG_WRITING;
 	pc->buffer = rq->data;
 	if (rq->bio)
-		set_bit(PC_DMA_RECOMMENDED, &pc->flags);
-		
+		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 	/*
 	 * possibly problematic, doesn't look like ide-floppy correctly
 	 * handled scattered requests if dma fails...
@@ -1057,7 +1067,7 @@ static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 	idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 						 MODE_SENSE_CURRENT);
 
-	set_bit(PC_SUPPRESS_ERROR, &pc.flags);
+	pc.flags |= PC_FLAG_SUPPRESS_ERROR;
 	if (idefloppy_queue_pc_tail(drive, &pc))
 		return 1;
 
@@ -1110,7 +1120,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 		switch (pc.buffer[desc_start + 4] & 0x03) {
 		/* Clik! drive returns this instead of CAPACITY_CURRENT */
 		case CAPACITY_UNFORMATTED:
-			if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
+			if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
                                 /*
 				 * If it is not a clik drive, break out
 				 * (maintains previous driver behaviour)
@@ -1156,7 +1166,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 	}
 
 	/* Clik! disk does not support get_flexible_disk_page */
-	if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
+	if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
 		(void) ide_floppy_get_flexible_disk_page(drive);
 
 	set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
@@ -1356,7 +1366,7 @@ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
 	*((u16 *) &gcw) = drive->id->config;
 	floppy->pc = floppy->pc_stack;
 	if (gcw.drq_type == 1)
-		set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
 	/*
 	 *	We used to check revisions here. At this point however
 	 *	I'm giving up. Just assume they are all broken, its easier.
@@ -1369,7 +1379,7 @@ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
 	 */
 
 	if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
-		set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
 		/* This value will be visible in the /proc/ide/hdx/settings */
 		floppy->ticks = IDEFLOPPY_TICKS_DELAY;
 		blk_queue_max_sectors(drive->queue, 64);
@@ -1382,7 +1392,7 @@ static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
 	*/
 	if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
 		blk_queue_max_sectors(drive->queue, 64);
-		set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
 	}
 
 
@@ -1472,7 +1482,7 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
 	floppy->openers++;
 
 	if (floppy->openers == 1) {
-		clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
 		/* Just in case */
 
 		idefloppy_create_test_unit_ready_cmd(&pc);
@@ -1497,14 +1507,14 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
 			ret = -EROFS;
 			goto out_put_floppy;
 		}
-		set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
 		/* IOMEGA Clik! drives do not support lock/unlock commands */
-                if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
+		if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
 			idefloppy_create_prevent_cmd(&pc, 1);
 			(void) idefloppy_queue_pc_tail(drive, &pc);
 		}
 		check_disk_change(inode->i_bdev);
-	} else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
+	} else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
 		ret = -EBUSY;
 		goto out_put_floppy;
 	}
@@ -1527,12 +1537,12 @@ static int idefloppy_release(struct inode *inode, struct file *filp)
 
 	if (floppy->openers == 1) {
 		/* IOMEGA Clik! drives do not support lock/unlock commands */
-                if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
+		if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
 			idefloppy_create_prevent_cmd(&pc, 0);
 			(void) idefloppy_queue_pc_tail(drive, &pc);
 		}
 
-		clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
 	}
 
 	floppy->openers--;
@@ -1561,7 +1571,7 @@ static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
 
 	/* The IOMEGA Clik! Drive doesn't support this command -
 	 * no room for an eject mechanism */
-	if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
+	if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
 		int prevent = arg ? 1 : 0;
 
 		if (cmd == CDROMEJECT)
@@ -1587,11 +1597,11 @@ static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
 
 	if (floppy->openers > 1) {
 		/* Don't format if someone is using the disk */
-		clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
 		return -EBUSY;
 	}
 
-	set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
+	floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
 
 	/*
 	 * Send ATAPI_FORMAT_UNIT to the drive.
@@ -1623,7 +1633,7 @@ static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
 
 out:
 	if (err)
-		clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
 	return err;
 }
 
@@ -1676,13 +1686,16 @@ static int idefloppy_media_changed(struct gendisk *disk)
 {
 	struct ide_floppy_obj *floppy = ide_floppy_g(disk);
 	ide_drive_t *drive = floppy->drive;
+	int ret;
 
 	/* do not scan partitions twice if this is a removable device */
 	if (drive->attach) {
 		drive->attach = 0;
 		return 0;
 	}
-	return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
+	ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
+	floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
+	return ret;
 }
 
 static int idefloppy_revalidate_disk(struct gendisk *disk)