linux-kernel - Re: [PATCH] hvc_console: returning 0 from put

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Message-ID: <4AD778E6.7020806@freescale.com>
Date:	Thu, 15 Oct 2009 14:32:54 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Christian Borntraeger <borntraeger@...ibm.com>
CC:	linuxppc-dev@...abs.org, brueckner@...ux.vnet.ibm.com,
	Timur Tabi <timur@...escale.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] hvc_console: returning 0 from put_chars is not an error

Christian Borntraeger wrote:
> About the backends, there are some that spin until the text is delivered (e.g. 
> virtio) , others can drop (e.g. iucv is a connection oriented protocol and it 
> will (and has to) drop if there is no connection). 

Sure, dropping due to not having a connection makes sense.  That's 
different from merely being busy.  Can the iucv code tell the difference 
between those two states?

-Scott
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