linux-kernel - Re: [PATCH 0/3] VME bus error handling overhaul

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Date:	Mon, 6 Jul 2015 13:31:47 +0100
From:	Martyn Welch <martyn.welch@...com>
To:	Dmitry Kalinkin <dmitry.kalinkin@...il.com>,
	<linux-kernel@...r.kernel.org>, <devel@...verdev.osuosl.org>
CC:	Manohar Vanga <manohar.vanga@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Igor Alekseev <igor.alekseev@...p.ru>
Subject: Re: [PATCH 0/3] VME bus error handling overhaul

Hi Dmitry,

These are looking good to me.

You mention error handling in relation to vme_master_mmap, am I right in 
thinking patch 3 avoids errors being recorded when triggered by an mmap 
access (so as not to appear as a spurious error on a later access)?

I think it would be worth at least logging errors to the kernel log 
should they be generated and not be handled by a error handler, so 
someone using mmap gets at least some form of notification that their 
accesses are resulting on bus errors. What do you think?

Martyn

On 02/07/15 15:11, Dmitry Kalinkin wrote:
> This moves tsi148 error handling into VME subsystem so it can be shared with
> the other bridge driver.  Then there is a change to close a fixme on separating
> errors by address space.  And finally a fix for memory leak problem that was
> introduced with support of mmap's.
>
> The next logical step in this direction would be to add error handling support
> to ca91cx42 and make it unconditional for tsi148. It also makes much sense to
> add synchronization to error-related list operations (spinlocks, rcu).
>
> Dmitry Kalinkin (3):
>    vme: move tsi148 error handling into VME subsystem
>    vme: include address space in error filtering
>    vme: change bus error handling scheme
>
>   drivers/vme/bridges/vme_ca91cx42.c |   3 +-
>   drivers/vme/bridges/vme_tsi148.c   | 170 ++++++++++---------------------------
>   drivers/vme/vme.c                  |  83 ++++++++++++++++++
>   drivers/vme/vme_bridge.h           |  21 +++--
>   4 files changed, 147 insertions(+), 130 deletions(-)
>

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