[PATCH 1/2] drm/etnaviv: fix get pages error path in etnaviv_gem_vaddr

[Russell King - ARM Linux]

On Tue, Jan 26, 2016 at 04:45:25PM +0100, Lucas Stach wrote:
> In case that etnaviv_gem_get_pages is unable to get the required
> pages the object mutex needs to be unlocked. Also return NULL in
> this case instead of propagating the error, as callers of this
> function might not be prepared to handle a pointer error, but
> expect this call to follow the semantics of a plain vmap to return
> NULL in case of an error.

If we're giving it vmap() semantics, then let's add another patch
which calls this function etnaviv_gem_vmap()...

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