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floppy: use symbolic register names in the x86 port

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Now we can use FD_STATUS and FD_DATA instead of 4 or 5, let's do
this, and also use STATUS_DMA and STATUS_READY for the status bits.

Link: https://lore.kernel.org/r/20200331094054.24441-9-w@1wt.eu
Cc: x86@kernel.org
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 11:40:39 +02:00 committed by Denis Efremov
parent 6cb7e69671
commit 38ede90831
1 changed files with 8 additions and 7 deletions
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15
arch/x86/include/asm/floppy.h
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@ -77,25 +77,26 @@ static irqreturn_t floppy_hardint(int irq, void *dev_id)
st = 1;
for (lcount = virtual_dma_count, lptr = virtual_dma_addr;
lcount; lcount--, lptr++) {
st = inb(virtual_dma_port + 4) & 0xa0;
if (st != 0xa0)
st = inb(virtual_dma_port + FD_STATUS);
st &= STATUS_DMA | STATUS_READY;
if (st != (STATUS_DMA | STATUS_READY))
break;
if (virtual_dma_mode)
outb_p(*lptr, virtual_dma_port + 5);
outb_p(*lptr, virtual_dma_port + FD_DATA);
else
*lptr = inb_p(virtual_dma_port + 5);
*lptr = inb_p(virtual_dma_port + FD_DATA);
}
virtual_dma_count = lcount;
virtual_dma_addr = lptr;
st = inb(virtual_dma_port + 4);
st = inb(virtual_dma_port + FD_STATUS);
}
#ifdef TRACE_FLPY_INT
calls++;
#endif
if (st == 0x20)
if (st == STATUS_DMA)
return IRQ_HANDLED;
if (!(st & 0x20)) {
if (!(st & STATUS_DMA)) {
virtual_dma_residue += virtual_dma_count;
virtual_dma_count = 0;
#ifdef TRACE_FLPY_INT