From: David Miller <davem@davemloft.net>
To: nhorman@tuxdriver.com
Cc: netdev@vger.kernel.org, cooldavid@cooldavid.org
Subject: Re: [PATCH] jme: Fix DMA unmap warning
Date: Wed, 07 May 2014 16:44:34 -0400 (EDT) [thread overview]
Message-ID: <20140507.164434.997979341700998470.davem@davemloft.net> (raw)
In-Reply-To: <20140507203317.GC8786@hmsreliant.think-freely.org>
From: Neil Horman <nhorman@tuxdriver.com>
Date: Wed, 7 May 2014 16:33:17 -0400
> Perhaps a solution is a signalling mechanism tied to completion interrupts?
> I.e. a mapping failure gets reported to the stack, which causes the
> correspondnig queue to be stopped, until such time a the driver signals a safe
> restart by the reception of a tx completion interrupt? I'm actually tinkering
> right now with a mechanism that provides guidance to the stack as to how many
> dma descriptors are available in a given net_device that might come in handy
> here
Another idea is to signal it from the IOMMU unmap itself, since that is the
point where the resource becomes available.
Actually either approach is fine with me.
next prev parent reply other threads:[~2014-05-07 20:44 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-05 18:51 [PATCH] jme: Fix DMA unmap warning Neil Horman
2014-05-06 20:25 ` Govindarajulu Varadarajan
2014-05-06 20:50 ` Neil Horman
2014-05-06 20:53 ` David Miller
2014-05-06 21:04 ` Govindarajulu Varadarajan
2014-05-06 21:10 ` David Miller
2014-05-07 19:56 ` David Miller
2014-05-07 20:33 ` Neil Horman
2014-05-07 20:44 ` David Miller [this message]
2014-05-07 21:54 ` Neil Horman
2014-05-08 9:02 ` David Laight
2014-05-08 11:00 ` Neil Horman
2014-05-08 11:16 ` David Laight
2014-05-08 17:24 ` David Miller
2014-05-08 19:29 ` [RFC PATCH] net: Provide linear backoff mechanism for constrained resources at the driver Neil Horman
2014-05-09 8:55 ` David Laight
2014-05-09 11:17 ` Neil Horman
2014-05-09 12:53 ` David Laight
2014-05-09 15:33 ` Neil Horman
2014-05-09 15:46 ` David Laight
2014-05-09 17:02 ` Neil Horman
2014-05-18 16:19 ` Neil Horman
2014-05-21 18:05 ` Cong Wang
2014-05-21 18:49 ` Neil Horman
2014-05-11 12:49 ` [PATCH] jme: Fix DMA unmap warning Ben Hutchings
2014-05-11 13:04 ` Neil Horman
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