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floppy: cleanup: make get_fdc_version() not rely on current_fdc anymore 

Now the fdc is passed in argument so that the function does not
use current_fdc anymore.

Link: https://lore.kernel.org/r/20200331094054.24441-22-w@1wt.eu
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Denis Efremov <efremov@linux.com>
This commit is contained in:
Willy Tarreau 2020-03-31 11:40:52 +02:00 committed by Denis Efremov
parent 43d81bb647
commit e5a9c95f9b
1 changed files with 26 additions and 26 deletions
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52
drivers/block/floppy.c
View File

@ -4297,79 +4297,79 @@ static const struct block_device_operations floppy_fops = {
/* Determine the floppy disk controller type */
/* This routine was written by David C. Niemi */
static char __init get_fdc_version(void)
static char __init get_fdc_version(int fdc)
{
int r;
output_byte(current_fdc, FD_DUMPREGS); /* 82072 and better know DUMPREGS */
if (fdc_state[current_fdc].reset)
output_byte(fdc, FD_DUMPREGS); /* 82072 and better know DUMPREGS */
if (fdc_state[fdc].reset)
return FDC_NONE;
r = result(current_fdc);
r = result(fdc);
if (r <= 0x00)
return FDC_NONE; /* No FDC present ??? */
if ((r == 1) && (reply_buffer[0] == 0x80)) {
pr_info("FDC %d is an 8272A\n", current_fdc);
pr_info("FDC %d is an 8272A\n", fdc);
return FDC_8272A; /* 8272a/765 don't know DUMPREGS */
}
if (r != 10) {
pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
current_fdc, r);
fdc, r);
return FDC_UNKNOWN;
}
if (!fdc_configure(current_fdc)) {
pr_info("FDC %d is an 82072\n", current_fdc);
if (!fdc_configure(fdc)) {
pr_info("FDC %d is an 82072\n", fdc);
return FDC_82072; /* 82072 doesn't know CONFIGURE */
}
output_byte(current_fdc, FD_PERPENDICULAR);
if (need_more_output(current_fdc) == MORE_OUTPUT) {
output_byte(current_fdc, 0);
output_byte(fdc, FD_PERPENDICULAR);
if (need_more_output(fdc) == MORE_OUTPUT) {
output_byte(fdc, 0);
} else {
pr_info("FDC %d is an 82072A\n", current_fdc);
pr_info("FDC %d is an 82072A\n", fdc);
return FDC_82072A; /* 82072A as found on Sparcs. */
}
output_byte(current_fdc, FD_UNLOCK);
r = result(current_fdc);
output_byte(fdc, FD_UNLOCK);
r = result(fdc);
if ((r == 1) && (reply_buffer[0] == 0x80)) {
pr_info("FDC %d is a pre-1991 82077\n", current_fdc);
pr_info("FDC %d is a pre-1991 82077\n", fdc);
return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know
* LOCK/UNLOCK */
}
if ((r != 1) || (reply_buffer[0] != 0x00)) {
pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
current_fdc, r);
fdc, r);
return FDC_UNKNOWN;
}
output_byte(current_fdc, FD_PARTID);
r = result(current_fdc);
output_byte(fdc, FD_PARTID);
r = result(fdc);
if (r != 1) {
pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n",
current_fdc, r);
fdc, r);
return FDC_UNKNOWN;
}
if (reply_buffer[0] == 0x80) {
pr_info("FDC %d is a post-1991 82077\n", current_fdc);
pr_info("FDC %d is a post-1991 82077\n", fdc);
return FDC_82077; /* Revised 82077AA passes all the tests */
}
switch (reply_buffer[0] >> 5) {
case 0x0:
/* Either a 82078-1 or a 82078SL running at 5Volt */
pr_info("FDC %d is an 82078.\n", current_fdc);
pr_info("FDC %d is an 82078.\n", fdc);
return FDC_82078;
case 0x1:
pr_info("FDC %d is a 44pin 82078\n", current_fdc);
pr_info("FDC %d is a 44pin 82078\n", fdc);
return FDC_82078;
case 0x2:
pr_info("FDC %d is a S82078B\n", current_fdc);
pr_info("FDC %d is a S82078B\n", fdc);
return FDC_S82078B;
case 0x3:
pr_info("FDC %d is a National Semiconductor PC87306\n", current_fdc);
pr_info("FDC %d is a National Semiconductor PC87306\n", fdc);
return FDC_87306;
default:
pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n",
current_fdc, reply_buffer[0] >> 5);
fdc, reply_buffer[0] >> 5);
return FDC_82078_UNKN;
}
} /* get_fdc_version */
@ -4711,7 +4711,7 @@ static int __init do_floppy_init(void)
continue;
}
/* Try to determine the floppy controller type */
fdc_state[current_fdc].version = get_fdc_version();
fdc_state[current_fdc].version = get_fdc_version(current_fdc);
if (fdc_state[current_fdc].version == FDC_NONE) {
/* free ioports reserved by floppy_grab_irq_and_dma() */
floppy_release_regions(current_fdc);