Re: [PATCH] video4linux: Push down the BKL

[Alan Cox]

On Tue, May 27, 2008 at 10:37:01PM -0400, Andy Walls wrote:
> I note the man page for open() doesn't list EBUSY as a valid errno.
> However, the V4L2 API Spec does list EBUSY as a valid errno for V4L2
> open().

The posix spec doesn't limit the errors returnable this way - it says if
the error is one of the ones listed it must return the error code stated so
EBUSY is just fine.

> But in this case I can't.  The driver probably shouldn't hold a lock and
> suspend an open() indefinitely (IMO).  It should say the device is BUSY

Agreed - especially if it is opened with O_NDELAY
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