Hi, newbies & guru's. We have written a quite simple CAN SJA1000 module, that is currently loaded into Linux kernels on various embedded machines (all of them based on Geode CPU's), and those boards - their IO - vary a little bit: some of them have paged the chip into memory, and so the SJA has to be accessed using readb/writeb after having reserved the IO range with request_mem_region, in the device open call. But, on other boards you must pull/push your bytes trough inb/outb, and open must be done with request_region. If one executes the first method on an architecture that requires method 2, the kernel oops'es with a page request fault. Not sooo good. LDD2 says, check_region has been obsoleted in 2.4, and it brings a code example for check_mem_region, that tells, if a certain region is already in use - that's not what I'm interested in. Now, my question: is there a possibility to do a plug-n-play game, at load time, in order to determine the necessary IO method ? Is it possible to 'catch' the oops, at load time also, and to ? Thx for any hints Michael -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
