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Other functions touching shmem->sgt take the pages lock, so do that here too. drm_gem_shmem_get_pages() & co take the same lock, so move to the _locked() variants to avoid recursive locking. Discovered while auditing locking to write the Rust abstractions. Fixes:2194a63a81("drm: Add library for shmem backed GEM objects") Fixes:4fa3d66f13("drm/shmem: Do dma_unmap_sg before purging pages") Signed-off-by: Asahi Lina <lina@asahilina.net> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230205125124.2260-1-lina@asahilina.net (cherry picked from commitaa8c85affe) Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>