linux-kernel - Re: [PATCH v2] um: Rewrite host RNG driver.

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Message-ID: <20190829165442.3a3425ad@TheDarkness>
Date:   Thu, 29 Aug 2019 16:56:35 -0400
From:   Alexander Neville <dark@...atile.bz>
To:     Richard Weinberger <richard@....at>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        linux-um <linux-um@...ts.infradead.org>,
        Richard Weinberger <richard.weinberger@...il.com>,
        Johannes Berg <johannes@...solutions.net>
Subject: Re: [PATCH v2] um: Rewrite host RNG driver.

On Thu, 29 Aug 2019 20:48:33 +0200 (CEST), Richard Weinberger <richard@....at> wrote:

> ----- Ursprüngliche Mail -----
> > Von: "Dark" <dark@...atile.bz>
> > +	// Returning -EAGAIN to userspace is not nice.
> > +	if (err == -EAGAIN)
> > +		return 0;  
> 
> Hmm, doesn't this result in a short read?
> The current drives sets the calling task to sleep and wakes
> it up as soon data is available again. I'd assumes ti have the
> same behavior for the new driver.
> 
> Thanks,
> //richard

Clearly this patch needs a lot more work before I submit it. I'll 
take some time to polish it up and then resubmit it if that's fine.