Re: [PATCH] DAC960 open with O_NONBLOCK

[Alan Cox]

> John Kamp has run across a libhd applcation from Suse that hit this bug.
> It's some kind of hardware detection application.  It opens devices with
> O_NONBLOCK.  But, it doesn't in fact use the DAC960 pass-through commands.

It should be checking major/minor first - rightfully or wrongly (I'd 
favour wrongly) open has side effects on multiple devices.

> The difficulty is that the Mylex application is available only in binary
> form.  Mylex is very secretive about its controller commands.
> It would be nice to be able to create a library that an application
> could call to perform high-level operations, and the library would
> construct the pass-through commands and pass them to the driver.
> Then, anyone could write their own GUI.

Or someone could just stick a command dumper in the driver. Thats how I
wrote ps and a few other utils for my aacraid 8)