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Message-Id: <20200224212352.8640-2-w@1wt.eu>
Date: Mon, 24 Feb 2020 22:23:43 +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 01/10] floppy: cleanup: expand macro FDCS
Macro FDCS silently uses identifier "fdc" which may be either the
global one or a local one. Let's expand the macro to make this more
obvious.
Signed-off-by: Willy Tarreau <w@....eu>
---
drivers/block/floppy.c | 183 ++++++++++++++++++++++++-------------------------
1 file changed, 91 insertions(+), 92 deletions(-)
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 8ef65c0..93e0840 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -309,7 +309,6 @@ static bool initialized;
#define DP (&drive_params[current_drive])
#define DRS (&drive_state[current_drive])
#define DRWE (&write_errors[current_drive])
-#define FDCS (&fdc_state[fdc])
#define UDP (&drive_params[drive])
#define UDRS (&drive_state[drive])
@@ -742,11 +741,11 @@ static int disk_change(int drive)
if (time_before(jiffies, UDRS->select_date + UDP->select_delay))
DPRINT("WARNING disk change called early\n");
- if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
- (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
+ if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive))) ||
+ (fdc_state[fdc].dor & 3) != UNIT(drive) || fdc != FDC(drive)) {
DPRINT("probing disk change on unselected drive\n");
DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive),
- (unsigned int)FDCS->dor);
+ (unsigned int)fdc_state[fdc].dor);
}
debug_dcl(UDP->flags,
@@ -799,10 +798,10 @@ static int set_dor(int fdc, char mask, char data)
unsigned char newdor;
unsigned char olddor;
- if (FDCS->address == -1)
+ if (fdc_state[fdc].address == -1)
return -1;
- olddor = FDCS->dor;
+ olddor = fdc_state[fdc].dor;
newdor = (olddor & mask) | data;
if (newdor != olddor) {
unit = olddor & 0x3;
@@ -812,7 +811,7 @@ static int set_dor(int fdc, char mask, char data)
"calling disk change from set_dor\n");
disk_change(drive);
}
- FDCS->dor = newdor;
+ fdc_state[fdc].dor = newdor;
fd_outb(newdor, FD_DOR);
unit = newdor & 0x3;
@@ -828,8 +827,8 @@ static void twaddle(void)
{
if (DP->select_delay)
return;
- fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
- fd_outb(FDCS->dor, FD_DOR);
+ fd_outb(fdc_state[fdc].dor & ~(0x10 << UNIT(current_drive)), FD_DOR);
+ fd_outb(fdc_state[fdc].dor, FD_DOR);
DRS->select_date = jiffies;
}
@@ -841,10 +840,10 @@ static void reset_fdc_info(int mode)
{
int drive;
- FDCS->spec1 = FDCS->spec2 = -1;
- FDCS->need_configure = 1;
- FDCS->perp_mode = 1;
- FDCS->rawcmd = 0;
+ fdc_state[fdc].spec1 = fdc_state[fdc].spec2 = -1;
+ fdc_state[fdc].need_configure = 1;
+ fdc_state[fdc].perp_mode = 1;
+ fdc_state[fdc].rawcmd = 0;
for (drive = 0; drive < N_DRIVE; drive++)
if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL))
UDRS->track = NEED_2_RECAL;
@@ -868,10 +867,10 @@ static void set_fdc(int drive)
#if N_FDC > 1
set_dor(1 - fdc, ~8, 0);
#endif
- if (FDCS->rawcmd == 2)
+ if (fdc_state[fdc].rawcmd == 2)
reset_fdc_info(1);
if (fd_inb(FD_STATUS) != STATUS_READY)
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
}
/* locks the driver */
@@ -924,7 +923,7 @@ static void floppy_off(unsigned int drive)
unsigned long volatile delta;
int fdc = FDC(drive);
- if (!(FDCS->dor & (0x10 << UNIT(drive))))
+ if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive))))
return;
del_timer(motor_off_timer + drive);
@@ -1035,7 +1034,7 @@ static void main_command_interrupt(void)
static int fd_wait_for_completion(unsigned long expires,
void (*function)(void))
{
- if (FDCS->reset) {
+ if (fdc_state[fdc].reset) {
reset_fdc(); /* do the reset during sleep to win time
* if we don't need to sleep, it's a good
* occasion anyways */
@@ -1063,13 +1062,13 @@ static void setup_DMA(void)
pr_cont("%x,", raw_cmd->cmd[i]);
pr_cont("\n");
cont->done(0);
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return;
}
if (((unsigned long)raw_cmd->kernel_data) % 512) {
pr_info("non aligned address: %p\n", raw_cmd->kernel_data);
cont->done(0);
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return;
}
f = claim_dma_lock();
@@ -1077,10 +1076,10 @@ static void setup_DMA(void)
#ifdef fd_dma_setup
if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length,
(raw_cmd->flags & FD_RAW_READ) ?
- DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) {
+ DMA_MODE_READ : DMA_MODE_WRITE, fdc_state[fdc].address) < 0) {
release_dma_lock(f);
cont->done(0);
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return;
}
release_dma_lock(f);
@@ -1091,7 +1090,7 @@ static void setup_DMA(void)
DMA_MODE_READ : DMA_MODE_WRITE);
fd_set_dma_addr(raw_cmd->kernel_data);
fd_set_dma_count(raw_cmd->length);
- virtual_dma_port = FDCS->address;
+ virtual_dma_port = fdc_state[fdc].address;
fd_enable_dma();
release_dma_lock(f);
#endif
@@ -1105,7 +1104,7 @@ static int wait_til_ready(void)
int status;
int counter;
- if (FDCS->reset)
+ if (fdc_state[fdc].reset)
return -1;
for (counter = 0; counter < 10000; counter++) {
status = fd_inb(FD_STATUS);
@@ -1116,7 +1115,7 @@ static int wait_til_ready(void)
DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc);
show_floppy();
}
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return -1;
}
@@ -1136,7 +1135,7 @@ static int output_byte(char byte)
output_log_pos = (output_log_pos + 1) % OLOGSIZE;
return 0;
}
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
if (initialized) {
DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n",
byte, fdc, status);
@@ -1171,7 +1170,7 @@ static int result(void)
fdc, status, i);
show_floppy();
}
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return -1;
}
@@ -1208,7 +1207,7 @@ static void perpendicular_mode(void)
default:
DPRINT("Invalid data rate for perpendicular mode!\n");
cont->done(0);
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
/*
* convenient way to return to
* redo without too much hassle
@@ -1219,12 +1218,12 @@ static void perpendicular_mode(void)
} else
perp_mode = 0;
- if (FDCS->perp_mode == perp_mode)
+ if (fdc_state[fdc].perp_mode == perp_mode)
return;
- if (FDCS->version >= FDC_82077_ORIG) {
+ if (fdc_state[fdc].version >= FDC_82077_ORIG) {
output_byte(FD_PERPENDICULAR);
output_byte(perp_mode);
- FDCS->perp_mode = perp_mode;
+ fdc_state[fdc].perp_mode = perp_mode;
} else if (perp_mode) {
DPRINT("perpendicular mode not supported by this FDC.\n");
}
@@ -1279,9 +1278,9 @@ static void fdc_specify(void)
int hlt_max_code = 0x7f;
int hut_max_code = 0xf;
- if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
+ if (fdc_state[fdc].need_configure && fdc_state[fdc].version >= FDC_82072A) {
fdc_configure();
- FDCS->need_configure = 0;
+ fdc_state[fdc].need_configure = 0;
}
switch (raw_cmd->rate & 0x03) {
@@ -1290,7 +1289,7 @@ static void fdc_specify(void)
break;
case 1:
dtr = 300;
- if (FDCS->version >= FDC_82078) {
+ if (fdc_state[fdc].version >= FDC_82078) {
/* chose the default rate table, not the one
* where 1 = 2 Mbps */
output_byte(FD_DRIVESPEC);
@@ -1305,7 +1304,7 @@ static void fdc_specify(void)
break;
}
- if (FDCS->version >= FDC_82072) {
+ if (fdc_state[fdc].version >= FDC_82072) {
scale_dtr = dtr;
hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
@@ -1335,11 +1334,11 @@ static void fdc_specify(void)
spec2 = (hlt << 1) | (use_virtual_dma & 1);
/* If these parameters did not change, just return with success */
- if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
+ if (fdc_state[fdc].spec1 != spec1 || fdc_state[fdc].spec2 != spec2) {
/* Go ahead and set spec1 and spec2 */
output_byte(FD_SPECIFY);
- output_byte(FDCS->spec1 = spec1);
- output_byte(FDCS->spec2 = spec2);
+ output_byte(fdc_state[fdc].spec1 = spec1);
+ output_byte(fdc_state[fdc].spec2 = spec2);
}
} /* fdc_specify */
@@ -1350,7 +1349,7 @@ static void fdc_specify(void)
static int fdc_dtr(void)
{
/* If data rate not already set to desired value, set it. */
- if ((raw_cmd->rate & 3) == FDCS->dtr)
+ if ((raw_cmd->rate & 3) == fdc_state[fdc].dtr)
return 0;
/* Set dtr */
@@ -1361,7 +1360,7 @@ static int fdc_dtr(void)
* enforced after data rate changes before R/W operations.
* Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
*/
- FDCS->dtr = raw_cmd->rate & 3;
+ fdc_state[fdc].dtr = raw_cmd->rate & 3;
return fd_wait_for_completion(jiffies + 2UL * HZ / 100, floppy_ready);
} /* fdc_dtr */
@@ -1414,7 +1413,7 @@ static int interpret_errors(void)
if (inr != 7) {
DPRINT("-- FDC reply error\n");
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return 1;
}
@@ -1548,7 +1547,7 @@ static void check_wp(void)
output_byte(FD_GETSTATUS);
output_byte(UNIT(current_drive));
if (result() != 1) {
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return;
}
clear_bit(FD_VERIFY_BIT, &DRS->flags);
@@ -1625,7 +1624,7 @@ static void recal_interrupt(void)
{
debugt(__func__, "");
if (inr != 2)
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
else if (ST0 & ST0_ECE) {
switch (DRS->track) {
case NEED_1_RECAL:
@@ -1693,7 +1692,7 @@ irqreturn_t floppy_interrupt(int irq, void *dev_id)
release_dma_lock(f);
do_floppy = NULL;
- if (fdc >= N_FDC || FDCS->address == -1) {
+ if (fdc >= N_FDC || fdc_state[fdc].address == -1) {
/* we don't even know which FDC is the culprit */
pr_info("DOR0=%x\n", fdc_state[0].dor);
pr_info("floppy interrupt on bizarre fdc %d\n", fdc);
@@ -1702,11 +1701,11 @@ irqreturn_t floppy_interrupt(int irq, void *dev_id)
return IRQ_NONE;
}
- FDCS->reset = 0;
+ fdc_state[fdc].reset = 0;
/* We have to clear the reset flag here, because apparently on boxes
* with level triggered interrupts (PS/2, Sparc, ...), it is needed to
- * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the
- * emission of the SENSEI's.
+ * emit SENSEI's to clear the interrupt line. And fdc_state[fdc].reset
+ * blocks the emission of the SENSEI's.
* It is OK to emit floppy commands because we are in an interrupt
* handler here, and thus we have to fear no interference of other
* activity.
@@ -1729,7 +1728,7 @@ irqreturn_t floppy_interrupt(int irq, void *dev_id)
inr == 2 && max_sensei);
}
if (!handler) {
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
return IRQ_NONE;
}
schedule_bh(handler);
@@ -1755,7 +1754,7 @@ static void reset_interrupt(void)
{
debugt(__func__, "");
result(); /* get the status ready for set_fdc */
- if (FDCS->reset) {
+ if (fdc_state[fdc].reset) {
pr_info("reset set in interrupt, calling %ps\n", cont->error);
cont->error(); /* a reset just after a reset. BAD! */
}
@@ -1771,7 +1770,7 @@ static void reset_fdc(void)
unsigned long flags;
do_floppy = reset_interrupt;
- FDCS->reset = 0;
+ fdc_state[fdc].reset = 0;
reset_fdc_info(0);
/* Pseudo-DMA may intercept 'reset finished' interrupt. */
@@ -1781,12 +1780,12 @@ static void reset_fdc(void)
fd_disable_dma();
release_dma_lock(flags);
- if (FDCS->version >= FDC_82072A)
- fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS);
+ if (fdc_state[fdc].version >= FDC_82072A)
+ fd_outb(0x80 | (fdc_state[fdc].dtr & 3), FD_STATUS);
else {
- fd_outb(FDCS->dor & ~0x04, FD_DOR);
+ fd_outb(fdc_state[fdc].dor & ~0x04, FD_DOR);
udelay(FD_RESET_DELAY);
- fd_outb(FDCS->dor, FD_DOR);
+ fd_outb(fdc_state[fdc].dor, FD_DOR);
}
}
@@ -1850,7 +1849,7 @@ static void floppy_shutdown(struct work_struct *arg)
if (initialized)
DPRINT("floppy timeout called\n");
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
if (cont) {
cont->done(0);
cont->redo(); /* this will recall reset when needed */
@@ -1870,7 +1869,7 @@ static int start_motor(void (*function)(void))
mask = 0xfc;
data = UNIT(current_drive);
if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) {
- if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) {
+ if (!(fdc_state[fdc].dor & (0x10 << UNIT(current_drive)))) {
set_debugt();
/* no read since this drive is running */
DRS->first_read_date = 0;
@@ -1878,7 +1877,7 @@ static int start_motor(void (*function)(void))
DRS->spinup_date = jiffies;
data |= (0x10 << UNIT(current_drive));
}
- } else if (FDCS->dor & (0x10 << UNIT(current_drive)))
+ } else if (fdc_state[fdc].dor & (0x10 << UNIT(current_drive)))
mask &= ~(0x10 << UNIT(current_drive));
/* starts motor and selects floppy */
@@ -1892,7 +1891,7 @@ static int start_motor(void (*function)(void))
static void floppy_ready(void)
{
- if (FDCS->reset) {
+ if (fdc_state[fdc].reset) {
reset_fdc();
return;
}
@@ -1991,7 +1990,7 @@ static int wait_til_done(void (*handler)(void), bool interruptible)
return -EINTR;
}
- if (FDCS->reset)
+ if (fdc_state[fdc].reset)
command_status = FD_COMMAND_ERROR;
if (command_status == FD_COMMAND_OKAY)
ret = 0;
@@ -2060,7 +2059,7 @@ static void bad_flp_intr(void)
if (err_count > DP->max_errors.abort)
cont->done(0);
if (err_count > DP->max_errors.reset)
- FDCS->reset = 1;
+ fdc_state[fdc].reset = 1;
else if (err_count > DP->max_errors.recal)
DRS->track = NEED_2_RECAL;
}
@@ -2967,8 +2966,8 @@ static int user_reset_fdc(int drive, int arg, bool interruptible)
return -EINTR;
if (arg == FD_RESET_ALWAYS)
- FDCS->reset = 1;
- if (FDCS->reset) {
+ fdc_state[fdc].reset = 1;
+ if (fdc_state[fdc].reset) {
cont = &reset_cont;
ret = wait_til_done(reset_fdc, interruptible);
if (ret == -EINTR)
@@ -3179,23 +3178,23 @@ static int raw_cmd_ioctl(int cmd, void __user *param)
int ret2;
int ret;
- if (FDCS->rawcmd <= 1)
- FDCS->rawcmd = 1;
+ if (fdc_state[fdc].rawcmd <= 1)
+ fdc_state[fdc].rawcmd = 1;
for (drive = 0; drive < N_DRIVE; drive++) {
if (FDC(drive) != fdc)
continue;
if (drive == current_drive) {
if (UDRS->fd_ref > 1) {
- FDCS->rawcmd = 2;
+ fdc_state[fdc].rawcmd = 2;
break;
}
} else if (UDRS->fd_ref) {
- FDCS->rawcmd = 2;
+ fdc_state[fdc].rawcmd = 2;
break;
}
}
- if (FDCS->reset)
+ if (fdc_state[fdc].reset)
return -EIO;
ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
@@ -3209,7 +3208,7 @@ static int raw_cmd_ioctl(int cmd, void __user *param)
ret = wait_til_done(floppy_start, true);
debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n");
- if (ret != -EINTR && FDCS->reset)
+ if (ret != -EINTR && fdc_state[fdc].reset)
ret = -EIO;
DRS->track = NO_TRACK;
@@ -4261,7 +4260,7 @@ static char __init get_fdc_version(void)
int r;
output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */
- if (FDCS->reset)
+ if (fdc_state[fdc].reset)
return FDC_NONE;
r = result();
if (r <= 0x00)
@@ -4494,7 +4493,7 @@ static int floppy_resume(struct device *dev)
int fdc;
for (fdc = 0; fdc < N_FDC; fdc++)
- if (FDCS->address != -1)
+ if (fdc_state[fdc].address != -1)
user_reset_fdc(-1, FD_RESET_ALWAYS, false);
return 0;
@@ -4605,15 +4604,15 @@ static int __init do_floppy_init(void)
for (i = 0; i < N_FDC; i++) {
fdc = i;
- memset(FDCS, 0, sizeof(*FDCS));
- FDCS->dtr = -1;
- FDCS->dor = 0x4;
+ memset(&fdc_state[fdc], 0, sizeof(*fdc_state));
+ fdc_state[fdc].dtr = -1;
+ fdc_state[fdc].dor = 0x4;
#if defined(__sparc__) || defined(__mc68000__)
/*sparcs/sun3x don't have a DOR reset which we can fall back on to */
#ifdef __mc68000__
if (MACH_IS_SUN3X)
#endif
- FDCS->version = FDC_82072A;
+ fdc_state[fdc].version = FDC_82072A;
#endif
}
@@ -4656,28 +4655,28 @@ static int __init do_floppy_init(void)
for (i = 0; i < N_FDC; i++) {
fdc = i;
- FDCS->driver_version = FD_DRIVER_VERSION;
+ fdc_state[fdc].driver_version = FD_DRIVER_VERSION;
for (unit = 0; unit < 4; unit++)
- FDCS->track[unit] = 0;
- if (FDCS->address == -1)
+ fdc_state[fdc].track[unit] = 0;
+ if (fdc_state[fdc].address == -1)
continue;
- FDCS->rawcmd = 2;
+ fdc_state[fdc].rawcmd = 2;
if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) {
/* free ioports reserved by floppy_grab_irq_and_dma() */
floppy_release_regions(fdc);
- FDCS->address = -1;
- FDCS->version = FDC_NONE;
+ fdc_state[fdc].address = -1;
+ fdc_state[fdc].version = FDC_NONE;
continue;
}
/* Try to determine the floppy controller type */
- FDCS->version = get_fdc_version();
- if (FDCS->version == FDC_NONE) {
+ fdc_state[fdc].version = get_fdc_version();
+ if (fdc_state[fdc].version == FDC_NONE) {
/* free ioports reserved by floppy_grab_irq_and_dma() */
floppy_release_regions(fdc);
- FDCS->address = -1;
+ fdc_state[fdc].address = -1;
continue;
}
- if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
+ if (can_use_virtual_dma == 2 && fdc_state[fdc].version < FDC_82072A)
can_use_virtual_dma = 0;
have_no_fdc = 0;
@@ -4783,7 +4782,7 @@ static void floppy_release_allocated_regions(int fdc, const struct io_region *p)
{
while (p != io_regions) {
p--;
- release_region(FDCS->address + p->offset, p->size);
+ release_region(fdc_state[fdc].address + p->offset, p->size);
}
}
@@ -4794,10 +4793,10 @@ static int floppy_request_regions(int fdc)
const struct io_region *p;
for (p = io_regions; p < ARRAY_END(io_regions); p++) {
- if (!request_region(FDCS->address + p->offset,
+ if (!request_region(fdc_state[fdc].address + p->offset,
p->size, "floppy")) {
DPRINT("Floppy io-port 0x%04lx in use\n",
- FDCS->address + p->offset);
+ fdc_state[fdc].address + p->offset);
floppy_release_allocated_regions(fdc, p);
return -EBUSY;
}
@@ -4840,23 +4839,23 @@ static int floppy_grab_irq_and_dma(void)
}
for (fdc = 0; fdc < N_FDC; fdc++) {
- if (FDCS->address != -1) {
+ if (fdc_state[fdc].address != -1) {
if (floppy_request_regions(fdc))
goto cleanup;
}
}
for (fdc = 0; fdc < N_FDC; fdc++) {
- if (FDCS->address != -1) {
+ if (fdc_state[fdc].address != -1) {
reset_fdc_info(1);
- fd_outb(FDCS->dor, FD_DOR);
+ fd_outb(fdc_state[fdc].dor, FD_DOR);
}
}
fdc = 0;
set_dor(0, ~0, 8); /* avoid immediate interrupt */
for (fdc = 0; fdc < N_FDC; fdc++)
- if (FDCS->address != -1)
- fd_outb(FDCS->dor, FD_DOR);
+ if (fdc_state[fdc].address != -1)
+ fd_outb(fdc_state[fdc].dor, FD_DOR);
/*
* The driver will try and free resources and relies on us
* to know if they were allocated or not.
@@ -4918,7 +4917,7 @@ static void floppy_release_irq_and_dma(void)
pr_info("work still pending\n");
old_fdc = fdc;
for (fdc = 0; fdc < N_FDC; fdc++)
- if (FDCS->address != -1)
+ if (fdc_state[fdc].address != -1)
floppy_release_regions(fdc);
fdc = old_fdc;
}
--
2.9.0
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