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Date: Mon, 24 Feb 2020 22:23:48 +0100
From: Willy Tarreau <w@....eu>
To: Denis Efremov <efremov@...ux.com>
Cc: Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
linux-block@...r.kernel.org,
Linus Torvalds <torvalds@...ux-foundation.org>,
Willy Tarreau <w@....eu>
Subject: [PATCH 06/10] floppy: cleanup: expand macro DP
This macro doesn't bring much value and only slightly obfuscates the
code by silently using global variable "current_drive", let's expand it.
Signed-off-by: Willy Tarreau <w@....eu>
---
drivers/block/floppy.c | 84 ++++++++++++++++++++++++++++----------------------
1 file changed, 47 insertions(+), 37 deletions(-)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index a76a9bb..7744e42 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -306,7 +306,6 @@ static bool initialized;
/* reverse mapping from unit and fdc to drive */
#define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
-#define DP (&drive_params[current_drive])
#define DRS (&drive_state[current_drive])
#define DRWE (&write_errors[current_drive])
@@ -624,7 +623,7 @@ static inline void set_debugt(void)
static inline void debugt(const char *func, const char *msg)
{
- if (DP->flags & DEBUGT)
+ if (drive_params[current_drive].flags & DEBUGT)
pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer);
}
#else
@@ -824,7 +823,7 @@ static int set_dor(int fdc, char mask, char data)
static void twaddle(void)
{
- if (DP->select_delay)
+ if (drive_params[current_drive].select_delay)
return;
fd_outb(fdc_state[fdc].dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
fd_outb(fdc_state[fdc].dor, FD_DOR);
@@ -950,7 +949,7 @@ static void scandrives(void)
int drive;
int saved_drive;
- if (DP->select_delay)
+ if (drive_params[current_drive].select_delay)
return;
saved_drive = current_drive;
@@ -1009,7 +1008,8 @@ static void cancel_activity(void)
* transfer */
static void fd_watchdog(void)
{
- debug_dcl(DP->flags, "calling disk change from watchdog\n");
+ debug_dcl(drive_params[current_drive].flags,
+ "calling disk change from watchdog\n");
if (disk_change(current_drive)) {
DPRINT("disk removed during i/o\n");
@@ -1310,20 +1310,23 @@ static void fdc_specify(void)
}
/* Convert step rate from microseconds to milliseconds and 4 bits */
- srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR);
+ srt = 16 - DIV_ROUND_UP(drive_params[current_drive].srt * scale_dtr / 1000,
+ NOMINAL_DTR);
if (slow_floppy)
srt = srt / 4;
SUPBOUND(srt, 0xf);
INFBOUND(srt, 0);
- hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR);
+ hlt = DIV_ROUND_UP(drive_params[current_drive].hlt * scale_dtr / 2,
+ NOMINAL_DTR);
if (hlt < 0x01)
hlt = 0x01;
else if (hlt > 0x7f)
hlt = hlt_max_code;
- hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR);
+ hut = DIV_ROUND_UP(drive_params[current_drive].hut * scale_dtr / 16,
+ NOMINAL_DTR);
if (hut < 0x1)
hut = 0x1;
else if (hut > 0xf)
@@ -1430,10 +1433,10 @@ static int interpret_errors(void)
} else if (ST1 & ST1_ND) {
set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
} else if (ST1 & ST1_OR) {
- if (DP->flags & FTD_MSG)
+ if (drive_params[current_drive].flags & FTD_MSG)
DPRINT("Over/Underrun - retrying\n");
bad = 0;
- } else if (*errors >= DP->max_errors.reporting) {
+ } else if (*errors >= drive_params[current_drive].max_errors.reporting) {
print_errors();
}
if (ST2 & ST2_WC || ST2 & ST2_BC)
@@ -1471,13 +1474,13 @@ static void setup_rw_floppy(void)
flags |= FD_RAW_INTR;
if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) {
- ready_date = DRS->spinup_date + DP->spinup;
+ ready_date = DRS->spinup_date + drive_params[current_drive].spinup;
/* If spinup will take a long time, rerun scandrives
* again just before spinup completion. Beware that
* after scandrives, we must again wait for selection.
*/
- if (time_after(ready_date, jiffies + DP->select_delay)) {
- ready_date -= DP->select_delay;
+ if (time_after(ready_date, jiffies + drive_params[current_drive].select_delay)) {
+ ready_date -= drive_params[current_drive].select_delay;
function = floppy_start;
} else
function = setup_rw_floppy;
@@ -1528,9 +1531,10 @@ static void seek_interrupt(void)
return;
}
if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) {
- debug_dcl(DP->flags,
+ debug_dcl(drive_params[current_drive].flags,
"clearing NEWCHANGE flag because of effective seek\n");
- debug_dcl(DP->flags, "jiffies=%lu\n", jiffies);
+ debug_dcl(drive_params[current_drive].flags, "jiffies=%lu\n",
+ jiffies);
clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
/* effective seek */
DRS->select_date = jiffies;
@@ -1551,9 +1555,10 @@ static void check_wp(void)
}
clear_bit(FD_VERIFY_BIT, &DRS->flags);
clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags);
- debug_dcl(DP->flags,
+ debug_dcl(drive_params[current_drive].flags,
"checking whether disk is write protected\n");
- debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40);
+ debug_dcl(drive_params[current_drive].flags, "wp=%x\n",
+ ST3 & 0x40);
if (!(ST3 & 0x40))
set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags);
else
@@ -1567,7 +1572,8 @@ static void seek_floppy(void)
blind_seek = 0;
- debug_dcl(DP->flags, "calling disk change from %s\n", __func__);
+ debug_dcl(drive_params[current_drive].flags,
+ "calling disk change from %s\n", __func__);
if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) &&
disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) {
@@ -1591,7 +1597,7 @@ static void seek_floppy(void)
if (raw_cmd->track)
track = raw_cmd->track - 1;
else {
- if (DP->flags & FD_SILENT_DCL_CLEAR) {
+ if (drive_params[current_drive].flags & FD_SILENT_DCL_CLEAR) {
set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
blind_seek = 1;
raw_cmd->flags |= FD_RAW_NEED_SEEK;
@@ -1643,7 +1649,7 @@ static void recal_interrupt(void)
* not to move at recalibration is to
* be already at track 0.) Clear the
* new change flag */
- debug_dcl(DP->flags,
+ debug_dcl(drive_params[current_drive].flags,
"clearing NEWCHANGE flag because of second recalibrate\n");
clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
@@ -1884,7 +1890,7 @@ static int start_motor(void (*function)(void))
set_dor(fdc, mask, data);
/* wait_for_completion also schedules reset if needed. */
- return fd_wait_for_completion(DRS->select_date + DP->select_delay,
+ return fd_wait_for_completion(DRS->select_date + drive_params[current_drive].select_delay,
function);
}
@@ -1899,9 +1905,10 @@ static void floppy_ready(void)
if (fdc_dtr())
return;
- debug_dcl(DP->flags, "calling disk change from floppy_ready\n");
+ debug_dcl(drive_params[current_drive].flags,
+ "calling disk change from floppy_ready\n");
if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
- disk_change(current_drive) && !DP->select_delay)
+ disk_change(current_drive) && !drive_params[current_drive].select_delay)
twaddle(); /* this clears the dcl on certain
* drive/controller combinations */
@@ -1930,7 +1937,8 @@ static void floppy_start(void)
reschedule_timeout(current_reqD, "floppy start");
scandrives();
- debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n");
+ debug_dcl(drive_params[current_drive].flags,
+ "setting NEWCHANGE in floppy_start\n");
set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
floppy_ready();
}
@@ -2032,11 +2040,11 @@ static int next_valid_format(void)
probed_format = DRS->probed_format;
while (1) {
- if (probed_format >= 8 || !DP->autodetect[probed_format]) {
+ if (probed_format >= 8 || !drive_params[current_drive].autodetect[probed_format]) {
DRS->probed_format = 0;
return 1;
}
- if (floppy_type[DP->autodetect[probed_format]].sect) {
+ if (floppy_type[drive_params[current_drive].autodetect[probed_format]].sect) {
DRS->probed_format = probed_format;
return 0;
}
@@ -2055,11 +2063,11 @@ static void bad_flp_intr(void)
}
err_count = ++(*errors);
INFBOUND(DRWE->badness, err_count);
- if (err_count > DP->max_errors.abort)
+ if (err_count > drive_params[current_drive].max_errors.abort)
cont->done(0);
- if (err_count > DP->max_errors.reset)
+ if (err_count > drive_params[current_drive].max_errors.reset)
fdc_state[fdc].reset = 1;
- else if (err_count > DP->max_errors.recal)
+ else if (err_count > drive_params[current_drive].max_errors.recal)
DRS->track = NEED_2_RECAL;
}
@@ -2189,7 +2197,7 @@ static int do_format(int drive, struct format_descr *tmp_format_req)
set_floppy(drive);
if (!_floppy ||
- _floppy->track > DP->tracks ||
+ _floppy->track > drive_params[current_drive].tracks ||
tmp_format_req->track >= _floppy->track ||
tmp_format_req->head >= _floppy->head ||
(_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
@@ -2345,7 +2353,7 @@ static void rw_interrupt(void)
}
if (probing) {
- if (DP->flags & FTD_MSG)
+ if (drive_params[current_drive].flags & FTD_MSG)
DPRINT("Auto-detected floppy type %s in fd%d\n",
_floppy->name, current_drive);
current_type[current_drive] = _floppy;
@@ -2675,9 +2683,9 @@ static int make_raw_rw_request(void)
*/
if (!direct ||
(indirect * 2 > direct * 3 &&
- *errors < DP->max_errors.read_track &&
+ *errors < drive_params[current_drive].max_errors.read_track &&
((!probing ||
- (DP->read_track & (1 << DRS->probed_format)))))) {
+ (drive_params[current_drive].read_track & (1 << DRS->probed_format)))))) {
max_size = blk_rq_sectors(current_req);
} else {
raw_cmd->kernel_data = bio_data(current_req->bio);
@@ -2855,7 +2863,7 @@ static void redo_fd_request(void)
}
}
probing = 1;
- _floppy = floppy_type + DP->autodetect[DRS->probed_format];
+ _floppy = floppy_type + drive_params[current_drive].autodetect[DRS->probed_format];
} else
probing = 0;
errors = &(current_req->error_count);
@@ -2934,7 +2942,8 @@ static int poll_drive(bool interruptible, int flag)
raw_cmd->track = 0;
raw_cmd->cmd_count = 0;
cont = &poll_cont;
- debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n");
+ debug_dcl(drive_params[current_drive].flags,
+ "setting NEWCHANGE in poll_drive\n");
set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags);
return wait_til_done(floppy_ready, interruptible);
@@ -3205,7 +3214,8 @@ static int raw_cmd_ioctl(int cmd, void __user *param)
raw_cmd = my_raw_cmd;
cont = &raw_cmd_cont;
ret = wait_til_done(floppy_start, true);
- debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
+ debug_dcl(drive_params[current_drive].flags,
+ "calling disk change from raw_cmd ioctl\n");
if (ret != -EINTR && fdc_state[fdc].reset)
ret = -EIO;
@@ -4386,7 +4396,7 @@ static void __init set_cmos(int *ints, int dummy, int dummy2)
if (current_drive >= 4 && !FDC2)
FDC2 = 0x370;
#endif
- DP->cmos = ints[2];
+ drive_params[current_drive].cmos = ints[2];
DPRINT("setting CMOS code to %d\n", ints[2]);
}
--
2.9.0
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