Re: [PATCH V4] tty/serial: add support for Xilinx PS UART

[Alan Cox]

> I don't agree with this change. NO_IRQ for microblaze, arm and other is -1. BTW: 
> For ppc is 0. Using NO_IRQ seems to me reasonable.

0 means "no interrupt".

The old mis-use of -1 is an old mostly ARM specific ugly that ahould be
going away not getting repeated further. If Microblaze is using this hack
then it needs to stop.

NO_IRQ was *purposefully* removed from general consumption a long time
ago for a good reason (historically it was an IDE driver internal define
certain people borrowed)

Alan
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