>> Hi all, this is my first post in this mailing list... I hope to find an >> answer. I've post the question in stackoverflow with the same tittle with no >> answers yet. Since then, I've been able to reduce the demo kernel module to >> minimum in order to show but I see. The minimum kernel module code is >> attached at the end. >> >> My kernel module was working ok up to kernel 5.10.x. My kernel module adds a >> layer above the cdc-acm class driver to use all the infrastructure this >> driver because the hardware it controls has a ttyACMx device. The minimum >> kernel module code attached shows how I open the ttyACMx device and try to >> set the baudrate. Once the device is opened I use the unlocked_ioctl >> function with TCSETS to set the new device properties. >> >> ret = fd->f_op->unlocked_ioctl(fd, TCSETS, (unsigned long >>int) &newtio);
>Ick, why do all of this from the kernel and not just do it from >userspace? > >Do you have a pointer to the source of your whole module so we can help >with solving the root problem and not mess with this specific >implementation which is not the correct thing to do at all. Hi Greg! Well, I can summarize as technological debt :( I have to maintain an old code and I've been succesful until now with minimal changes... Is there no way to overcome this? Thanks! Jorge _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
