On Tue, Feb 25, 2020 at 06:22:47PM +0300, Denis Efremov wrote:
> I think that for the first attempt changing will be enough:
> -static int fdc; /* current fdc */
> +static int current_fdc; /* current fdc */
> and
> -#define FD_IOPORT fdc_state[fdc].address
> +#define FD_IOPORT fdc_state[current_fdc].address
> and for fd_setdor in ./arch/arm/include/asm/floppy.h
So after a bit more digging, that should not be correct because:
- disk_change() uses a local "fdc" variable with expectations that
it will be used by fd_inb(FD_DIR)
- set_dor() uses a local fdc argument that's used by
fd_outb(newdor, FD_DOR)
Here we have "fdc" hidden in:
- FD_DOR/FD_DIR (referencing FD_IOPORT) on x86
- fd_outb(), relying on fd_setdor() on ARM
I'm now looking how to change fd_outb() to pass the fdc in argument,
after all it's not that many places and that's exactly what we need.
Maybe afterwards we'll figure that some of them are still wrong :-)
Willy
