On Sat, Feb 02, 2002 at 11:21:00PM +0000, Christoph Bartelmus wrote:
> Now the problem:
> 3. Open the /dev/ttySx for the port that is occupied by the lirc_serial
> module. rs_open() does not check the state of the serial port and returns
> no error. Now you can use setserial to hijack the port... lirc_serial
> stops working.
One of setserial's basic functions is to configure a ttyS device for a
serial port that you know is there. In this patch, you are preventing
any port that is in 'PORT_UNKNOWN' state from being changed, even if
you want to change the IRQ and IO base address. This is a different,
but nevertheless fundamental problem.
The real bug is that serial.c should allows you to change the port from
'PORT_UNKNOWN' even when it can't grab the resources for the port.
Thanks for finding it - are you able to work on this more to come up
with a better fix?
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
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