From: Dave Airlie <airlied@gmail.com>
To: dri-devel@lists.freedesktop.org
Subject: allow drivers to fix kexec bus mastering hole
Date: Mon, 19 Dec 2011 14:16:28 +0000 [thread overview]
Message-ID: <1324304190-8368-1-git-send-email-airlied@gmail.com> (raw)
kexec relies on disabling bus mastering on PCI devices to block wayward DMAs
left set by the previous kernel. However the drm midlayer was enabling bus
mastering for all PCI drivers before calling into them. This meant no matter
what they did, there was always going to be a small race window. The
first patch pushes the enable into the drivers, and the second radeon patch
moves bus mastering enable to later in the driver load procedure for the kms
driver. These two along with Jerome's sanity patch should close the race completely.
please check the first one to make sure I didn't miss any drivers.
Dave.
next reply other threads:[~2011-12-19 14:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-19 14:16 Dave Airlie [this message]
2011-12-19 14:16 ` [PATCH 1/2] drm: move pci bus master enable into driver Dave Airlie
2011-12-19 14:16 ` [PATCH 2/2] drm/radeon/kms: move pci bus master enable further " Dave Airlie
2011-12-19 16:35 ` Alex Deucher
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