RE: [Intel-gfx] [PATCH] drm/i915: check if execlist_port is empty before using its content

From	"Du, Changbin" <changbin.du@intel.com>
Newsgroups	linux.kernel
Subject	RE: [Intel-gfx] [PATCH] drm/i915: check if execlist_port is empty before using its content
Date	2016-12-26 08:50 +0100
Message-ID	<sSycF-1KC-9@gated-at.bofh.it> (permalink)
References	<sRqTT-2Or-7@gated-at.bofh.it> <sRsVH-41t-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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> On Fri, Dec 23, 2016 at 01:46:36PM +0800, changbin.du@intel.com wrote:
> > From: "Du, Changbin" <changbin.du@intel.com>
> >
> > This patch fix a crash in function reset_common_ring. In this case,
> > the port[0].request is null when reset the render ring, so a null
> > dereference exception is raised. We need to check execlist_port status
> > first.
> 
> No. The root cause is whatever got you into the illegal condition in the
> first place.
> -Chris
> 
Thanks, I will restudy the code after process my current job. Since this happen
on gvt guest, so this may related to gvt emulation.

> --
> Chris Wilson, Intel Open Source Technology Centre

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[PATCH] drm/i915: check if execlist_port is empty before using its content changbin.du@intel.com - 2016-12-23 06:50 +0100
  Re: [PATCH] drm/i915: check if execlist_port is empty before using its content Jani Nikula <jani.nikula@linux.intel.com> - 2016-12-23 08:10 +0100
  Re: [Intel-gfx] [PATCH] drm/i915: check if execlist_port is empty  before using its content Chris Wilson <chris@chris-wilson.co.uk> - 2016-12-23 09:00 +0100
    RE: [Intel-gfx] [PATCH] drm/i915: check if execlist_port is empty  before using its content "Du, Changbin" <changbin.du@intel.com> - 2016-12-26 08:50 +0100

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