Messages in this thread |  | | | From | (David Hinds) | | Subject | Re: reserve= not working, drivers fail to do check_region | | Date | 10 Jan 1997 17:24:00 GMT |
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Thomas Sailer (sailer@ife.ee.ethz.ch) wrote: : > There are two sorts of things that should be fixed here: drivers that : > call check_region() when passed a specific address should be fixed to : > not do that, and drivers that don't call check_region before automatic : > probes should be fixed to check first.
: This as a very dangerous idea. There are currently drivers competing : for the same hardware resource. For example the serial and the baycom : drivers. When the serial driver gets loaded, it grabs all serial : ports it finds. Now when someone afterwards loads the baycom driver : and tells it to use a specific COM port, it would, using your idea, : use this specific port and the serial driver would not know anything : about that. This would result in two drivers trying to drive : the same hardware with different ideas :-)
I think you're misreading something here. My statement addresses exactly the sort of problem that you're raising here. In this example, the correct thing to do would be to use reserve= to prevent the serial driver from probing the Baycom port (which will work if the serial driver calls check_region before probing). Then, pass the address to the Baycom driver, which will ignore the reserve= since you've specified an explicit address.
-- Dave
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