static void floppy_hardint()

in include/asm/floppy.h [52:117]

• 60 lines of code
• 9 McCabe index (conditional complexity)

static void floppy_hardint(int irq, void *dev_id, struct pt_regs * regs)
{
	register unsigned char st;

#undef TRACE_FLPY_INT

#ifdef TRACE_FLPY_INT
	static int calls=0;
	static int bytes=0;
	static int dma_wait=0;
#endif
	if (!doing_pdma) {
		floppy_interrupt(irq, dev_id, regs);
		return;
	}

#ifdef TRACE_FLPY_INT
	if(!calls)
		bytes = virtual_dma_count;
#endif

	{
		register int lcount;
		register char *lptr = virtual_dma_addr;

		for (lcount = virtual_dma_count; lcount; lcount--) {
			st = fd_inb(virtual_dma_port, FD_STATUS);
			st &= STATUS_DMA | STATUS_READY;
			if (st != (STATUS_DMA | STATUS_READY))
				break;
			if (virtual_dma_mode) {
				fd_outb(*lptr, virtual_dma_port, FD_DATA);
			} else {
				*lptr = fd_inb(virtual_dma_port, FD_DATA);
			}
			lptr++;
		}
		virtual_dma_count = lcount;
		virtual_dma_addr = lptr;
		st = fd_inb(virtual_dma_port, FD_STATUS);
	}

#ifdef TRACE_FLPY_INT
	calls++;
#endif
	if (st == STATUS_DMA)
		return;
	if (!(st & STATUS_DMA)) {
		virtual_dma_residue += virtual_dma_count;
		virtual_dma_count = 0;
#ifdef TRACE_FLPY_INT
		printk("count=%x, residue=%x calls=%d bytes=%d dma_wait=%d\n", 
		       virtual_dma_count, virtual_dma_residue, calls, bytes,
		       dma_wait);
		calls = 0;
		dma_wait=0;
#endif
		doing_pdma = 0;
		floppy_interrupt(irq, dev_id, regs);
		return;
	}
#ifdef TRACE_FLPY_INT
	if (!virtual_dma_count)
		dma_wait++;
#endif
}