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[media] v4l: make sure drivers supply a zeroed struct v4l2_subdev
Some v4l drivers currently don't initialize their struct v4l2_subdev with zeros, and this is a problem since some of the v4l2 code expects this. One example is the addition of internal_ops in commit 45f6f84, after that we are at risk of random oopses with these drivers when code in v4l2_device_register_subdev tries to dereference sd->internal_ops->*, as can be shown by the report at http://bugs.launchpad.net/bugs/745213 and analysis of its crash at https://lkml.org/lkml/2011/4/1/168 Use kzalloc within problematic drivers to ensure we have a zeroed struct v4l2_subdev. BugLink: http://bugs.launchpad.net/bugs/745213 Cc: <stable@kernel.org> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Herton Ronaldo Krzesinski
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Mauro Carvalho Chehab
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Apr 29, 2011
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