linux-kernel - Re: RFC: UIO null parent for __uio_register_device and uio_device

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Message-ID: <4D371B28.8020501@ixiacom.com>
Date:	Wed, 19 Jan 2011 09:11:04 -0800
From:	Earl Chew <echew@...acom.com>
To:	Greg KH <greg@...ah.com>
CC:	"Hans J. Koch" <hjk@...sjkoch.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: RFC: UIO  null parent for __uio_register_device and uio_device_name()

Greg,

I wrote:
> I think you're telling me you won't accept either of:
> 
> a. uio_device_name()
> b. uio_device_chrdev()
[ snip ]
> With no sysfs, I cannot think of a way to get hold of the minor number allocated
> to this instance of the Linux UIO device, and without that I can't open() the
> device driver.

Would you consider :

	extern int uio_device_minor(struct uio_info *info);

?

That would allow me to reconstitute the coordinates of the Linux UIO device
instance from a combination of /proc/devices and a uio_device_minor() query.

Earl
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