A major:minor collision in 2.6.15

[Alon Keren]

On 2/14/06, Russell King <rmk+pcmcia at arm.linux.org.uk> wrote:
> On Mon, Feb 13, 2006 at 09:30:55PM +0200, Alon Keren wrote:
> > I have the following setup:
> > Kernel: 2.6.15
> > pcmciautils-012
> > PCMCIA-card: Advantech's COMpad-32/85
> >
> > For some reason, my card seems to be in conflict with another card (an
> > old V.34 modem) for the same major:minor numbers - 4:65.
>
> Please provide the contents of /proc/tty/driver/serial for each of these
> cases.  Thanks.
>

The contents of '/proc/tty/driver/serial' in the 2.6.15 machine:
When NO cards are in:

        serinfo:1.0 driver revision:
        0: uart:16550A port:000003F8 irq:4 tx:0 rx:0
        1: uart:unknown port:00004338 irq:3
        2: uart:16550A port:000003E8 irq:4 tx:0 rx:0
        3: uart:unknown port:00004330 irq:3

Modem is inserted first (both cards are in):

        serinfo:1.0 driver revision:
        0: uart:16550A port:000003F8 irq:4 tx:0 rx:0
        1: uart:16550A port:000043F8 irq:3 tx:0 rx:0 CTS|DSR
        2: uart:16550A port:000003E8 irq:4 tx:0 rx:0
        3: uart:16550A port:00004330 irq:4 tx:0 rx:0

COMpad is inserted first (both cards are in):

        serinfo:1.0 driver revision:
        0: uart:16550A port:000003F8 irq:4 tx:0 rx:0
        1: uart:16550A port:00004338 irq:3 tx:0 rx:0
        2: uart:16550A port:000003E8 irq:4 tx:0 rx:0
        3: uart:16550A port:00004330 irq:3 tx:0 rx:0

The file's contents in the 2.6.11 machine, when the COMpad is inserted first:

	serinfo:1.0 driver revision:
	0: uart:16550A port:000003F8 irq:4 tx:0 rx:0
	1: uart:16550A port:000002F8 irq:5 tx:0 rx:0 CTS|DSR
	2: uart:16550A port:000003E8 irq:4 tx:0 rx:0
	3: uart:unknown port:000002E8 irq:3
	4: uart:unknown port:000001A0 irq:9
	5: uart:unknown port:000001A8 irq:9
	6: uart:unknown port:000001B0 irq:9
	7: uart:unknown port:000001B8 irq:9
	8: uart:unknown port:000002A0 irq:5
	9: uart:unknown port:000002A8 irq:5
	10: uart:unknown port:000002B0 irq:5
	11: uart:unknown port:000002B8 irq:5
	12: uart:16550A port:00000330 irq:3 tx:0 rx:0
	13: uart:16550A port:00000338 irq:3 tx:0 rx:0
	14: uart:unknown port:00000000 irq:0
	15: uart:unknown port:00000000 irq:0
	16: uart:unknown port:00000100 irq:12
	17: uart:unknown port:00000108 irq:12
	18: uart:unknown port:00000110 irq:12
	19: uart:unknown port:00000118 irq:12
	20: uart:unknown port:00000120 irq:12
	21: uart:unknown port:00000128 irq:12
	22: uart:unknown port:00000130 irq:12
	23: uart:unknown port:00000138 irq:12
	24: uart:unknown port:00000140 irq:12
	25: uart:unknown port:00000148 irq:12
	26: uart:unknown port:00000150 irq:12
	27: uart:unknown port:00000158 irq:12
	28: uart:unknown port:00000160 irq:12
	29: uart:unknown port:00000168 irq:12
	30: uart:unknown port:00000170 irq:12
	31: uart:unknown port:00000178 irq:12
	32: uart:unknown port:00000302 irq:3
	33: uart:unknown port:00000302 irq:3
	34: uart:unknown port:00000302 irq:3
	35: uart:unknown port:00000302 irq:3
	36: uart:unknown port:00000302 irq:3
	37: uart:unknown port:00000302 irq:3
	38: uart:unknown port:00000302 irq:3
	39: uart:unknown port:00000302 irq:3
	40: uart:unknown port:00000302 irq:3
	41: uart:unknown port:00000302 irq:3
	42: uart:unknown port:00000302 irq:3
	43: uart:unknown port:00000302 irq:3
	44: uart:unknown port:00000000 irq:0
	45: uart:unknown port:00000000 irq:0
	46: uart:unknown port:00000000 irq:0
	47: uart:unknown port:00000000 irq:0