Arthur Roberts wrote:
> Hello,
>
> We have modified tsuart1.c as requested (using the kernel source
> supplied on the CD and the crosscompiler supplied:
> ts7800-crosstool- linux-gnueabi- 2005q3-2) , after uploading the tsuart1.ko
> onto the board and placing it in the right /lib/modules/ ... we can them
> rmmod the tsuart1 and tsuart7800 and then modprobe the new tsuart1 and
> tsuart7800. We can confirm we have done so by looking at printk messages
> in dmesg. However this results in a segmentation fault when trying to
> change port parameters. We note that it appears that the board doesn't
> load the module placed in /lib/modules/ ... and rather uses its own
> original tsuart1.ko via some sort of initrd-based process, so the only
> way to use our re-cross-compiled module is to do rmmod/modprobe. Can you
Unfortunately the code in tsuart0.c/tsuart1. c that handles rmmod was
never tested and is known to not correctly uninstall everything so as to
avoid the segfault you are seeing.
> please help us by providing a bit more information on how to replace the
> kernel module on the board in the proper way? Or alternatively help us
> get this new latency setting working one way or another. :-)
If you have a Linux PC with an SD card reader you can mount the initrd
partition (partition 3 on the TS-7800) and copy tsuart1.ko to overwrite
the existing copy... if I remember correctly it's in the root directory
of the initrd.
You can also change the board to fast boot (most boards look for
"tsfastboot" or "fastboot" in / of the Debian partition), then copy the
file over from the fastboot prompt and then run the 'save' command.
I think you could also mount the initrd partition from the full Debian
boot. However I am more familiar with the two previous methods.
> Thanks,
> Arthur.
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|__ __/ Michael Schmidt
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