Re: [PATCH] 2.6.10 Altix : ioc4 serial driver support

From: Matthew Wilcox
Date: Wed Dec 22 2004 - 15:34:14 EST

On Wed, Dec 22, 2004 at 01:53:28PM -0600, Patrick Gefre wrote:
> Christoph Hellwig wrote:
> >So both claim the same PCI ID? In this case you need to creat a small
> >shim driver that exports a pseudo-bus to the serial and ide driver using
> >the driver model. You must never return an error from ->probe if you
> >actually use that particular device.
> Has this been done before ? Any example I can use ??

drivers/parisc/superio.c does something similar. I'm not sure I'd hold
it up as a shining example of how to write a driver ... constructive
criticism welcomed, thought there's some outstanding changes still in
the parisc tree that need to go upstream.

> Why is that ? Seems if kmalloc returns a void * and the left side is not, a
> casting is appropriate ?

void * is special and different. This is exactly why it was invented, btw.

"Next the statesmen will invent cheap lies, putting the blame upon
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince
himself that the war is just, and will thank God for the better sleep
he enjoys after this process of grotesque self-deception." -- Mark Twain
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