drm: make minors independent of global lock

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We used to protect minor-lookup and setup by the global drm lock. To
continue our attempts of dropping drm_global_mutex, this patch makes the
minor management independent of it. Furthermore, we make it all atomic and
switch to spin-locks instead of a mutex.

Now that minor-lookup is independent, we also move the
"drm_is_unplugged()" test into the minor-lookup path. There is no reason
to ever return a minor for unplugged objects, so keep that logic internal.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>

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This commit is contained in:

David Herrmann 2014-02-24 15:53:25 +01:00

parent 7d86cf1a4f

commit 0d639883ee

2 changed files with 46 additions and 16 deletions

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11

drivers/gpu/drm/drm_fops.c

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53

drivers/gpu/drm/drm_stub.c

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