On Mon, Jan 20, 2014 at 09:43:05PM +0000, Alan Cox wrote: > The dynamic major/minor is the right patch. If the userspace breaks then > the userspace was broken, but I see no evidence in the discussion that > the userspace broke. The userspace breakage is that if someone has a static /dev that doesn't handle any dynamic devices then renumbering the device will cause that static /dev to stop matching the kernel. > Thats what the list says. Samsung should have followed the rules, they > didn't so they get to pick up the pieces. The Amba driver wants moving as > well. It's easy. If you want something to be ABI then make sure you get > it upstream first, if not you get to own all the pain down the line. This stuff is all upstream already, a quick check suggests both drivers predate git - it's been noticed because the ARM multiplatform work has caused people to try booting kernels with both built in. > If the hardware isn't present then the driver shouldn't even register > with the tty layer in the first place so it doesn't make any resource > differeneces either for properly written code. Right, that's not the idiom that has been followed by any of serial drivers though so needs fixing too.
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