[PATCH 10/12] ide-floppy: remove atomic test_*bit macros

Borislav Petkov
2008-01-13T20:26:00Z

..and replace them with flag enums.

Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de>
---
drivers/ide/ide-floppy.c | 132 +++++++++++++++++++++++++--------------------
1 files changed, 73 insertions(+), 59 deletions(-)

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 790e33f..8e7714a 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -107,16 +107,21 @@ 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_ABORT 0 /* Set when an error is considered normal - We won't retry */
-#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 {
+ /* Set when an error is considered normal - We won't retry */
+ PC_FLAG_ABORT = (1 << 0),
+ /* 1 when we prefer to use DMA if possible */
+ PC_FLAG_DMA_RECOMMENDED = (1 << 1),
+ /* 1 while DMA in progress */
+ PC_FLAG_DMA_IN_PROGRESS = (1 << 2),
+ /* 1 when encountered problem during DMA */
+ PC_FLAG_DMA_ERROR = (1 << 3),
+ /* Data direction */
+ PC_FLAG_WRITING = (1 << 4),
+ /* Suppress error reporting */
+ PC_FLAG_SUPPRESS_ERROR = (1 << 5),
+};

/* format capacities descriptor codes */
#define CAPACITY_INVALID 0x00
@@ -175,14 +180,19 @@ 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
@@ -506,14 +516,14 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)

debug_log("Reached %s interrupt handler\n", __FUNCTION__);

- if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
+ if (PC_FLAG_DMA_IN_PROGRESS & pc->flags) {
dma_error = HWIF(drive)->ide_dma_end(drive);
if (dma_error) {
printk(KERN_ERR "%s: DMA %s error\n",
drive->name,
rq_data_dir(rq) == WRITE ? "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);
@@ -527,11 +537,11 @@ 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_FLAG_DMA_ERROR & pc->flags)) {
/* Error detected */
debug_log("I/O error\n", drive->name);
rq->errors++;
@@ -553,7 +563,8 @@ 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_FLAG_DMA_IN_PROGRESS & pc->flags) {
+ 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);
@@ -570,7 +581,7 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __FUNCTION__);
return ide_do_reset(drive);
}
- if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
+ if (((ireason & IO) == IO) == (PC_FLAG_WRITING & pc->flags)) {
/* Hopefully, we will never get here */
printk(KERN_ERR "ide-floppy: We wanted to %s, ",
(ireason & IO) ? "Write" : "Read");
@@ -578,7 +589,7 @@ 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_FLAG_WRITING & pc->flags)) {
/* Reading - Check that we have enough space */
temp = pc->actually_transferred + bcount;
if (temp > pc->request_transfer) {
@@ -598,7 +609,7 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
" expected - allowing transfer\n");
}
}
- if (test_bit(PC_WRITING, &pc->flags))
+ if (PC_FLAG_WRITING & pc->flags)
xferfunc = hwif->atapi_output_bytes;
else
xferfunc = hwif->atapi_input_bytes;
@@ -607,7 +618,7 @@ 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_FLAG_WRITING & pc->flags));

/* Update the current position */
pc->actually_transferred += bcount;
@@ -738,13 +749,13 @@ 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 ||
- test_bit(PC_ABORT, &pc->flags)) {
+ (PC_FLAG_ABORT & pc->flags)) {
/*
* We will "abort" retrying a packet command in case
* a legitimate error code was received.
*/
- if (!test_bit(PC_ABORT, &pc->flags)) {
- if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags))
+ if (!(PC_FLAG_ABORT & pc->flags)) {
+ if (!(PC_FLAG_SUPPRESS_ERROR & pc->flags))
ide_floppy_report_error(floppy, pc);
/* Giving up */
pc->error = IDEFLOPPY_ERROR_GENERAL;
@@ -762,24 +773,25 @@ 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_FLAG_DMA_ERROR & pc->flags) {
+ 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_FLAG_DMA_RECOMMENDED & pc->flags) && 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 (IDEFLOPPY_FLAG_ZIP_DRIVE & floppy->flags) {
/* wait */
pkt_xfer_routine = &idefloppy_transfer_pc1;
} else {
@@ -787,7 +799,7 @@ 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 (IDEFLOPPY_FLAG_DRQ_INTERRUPT & floppy->flags) {
/* Issue the packet command */
ide_execute_command(drive, WIN_PACKETCMD,
pkt_xfer_routine,
@@ -845,7 +857,7 @@ 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;
}

/*
@@ -907,10 +919,10 @@ 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
@@ -922,11 +934,10 @@ 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...
@@ -1067,7 +1078,7 @@ 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;

@@ -1120,7 +1131,7 @@ 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 (!(IDEFLOPPY_FLAG_CLIK_DRIVE & floppy->flags))
/*
* If it is not a clik drive, break out
* (maintains previous driver behaviour)
@@ -1166,7 +1177,7 @@ 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 (!(IDEFLOPPY_FLAG_CLIK_DRIVE & floppy->flags))
(void) ide_floppy_get_flexible_disk_page(drive);

set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
@@ -1400,7 +1411,7 @@ 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.
@@ -1413,7 +1424,7 @@ 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);
@@ -1426,7 +1437,7 @@ 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;
}

@@ -1516,7 +1527,7 @@ 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);
@@ -1541,14 +1552,14 @@ 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 (!(IDEFLOPPY_FLAG_CLIK_DRIVE & floppy->flags)) {
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 (IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS & floppy->flags) {
ret = -EBUSY;
goto out_put_floppy;
}
@@ -1571,12 +1582,12 @@ 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 (!(IDEFLOPPY_FLAG_CLIK_DRIVE & floppy->flags)) {
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--;
@@ -1605,7 +1616,7 @@ 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 (!(IDEFLOPPY_FLAG_CLIK_DRIVE & floppy->flags)) {
int prevent = arg ? 1 : 0;

if (cmd == CDROMEJECT)
@@ -1631,11 +1642,11 @@ 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.
@@ -1667,7 +1678,7 @@ 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;
}

@@ -1720,13 +1731,16 @@ 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 = IDEFLOPPY_FLAG_MEDIA_CHANGED & floppy->flags;
+ floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
+ return ret;
}

static int idefloppy_revalidate_disk(struct gendisk *disk)
--
1.5.3.7