From: Thomas Backlund tmb@mageia.org
Not-entirely-upstream-sha1-but-equivalent: bed2dd8421 ("drm/ttm: Quick-test mmap offset in ttm_bo_mmap()")
Setting CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT=n (added by commit: b30a43ac7132) causes the build to fail with:
ERROR: "drm_legacy_mmap" [drivers/gpu/drm/nouveau/nouveau.ko] undefined!
This does not happend upstream as the offending code got removed in: bed2dd8421 ("drm/ttm: Quick-test mmap offset in ttm_bo_mmap()")
Fix that by adding check for CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT around the drm_legacy_mmap() call.
Also, as Sven Joachim pointed out, we need to make the check in CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT=n case return -EINVAL as its done for basically all other gpu drivers, especially in upstream kernels drivers/gpu/drm/ttm/ttm_bo_vm.c as of the upstream commit bed2dd8421.
NOTE. This is a minimal stable-only fix for trees where b30a43ac7132 is backported as the build error affects nouveau only.
Fixes: b30a43ac7132 ("drm/nouveau: add kconfig option to turn off nouveau legacy contexts. (v3)") Signed-off-by: Thomas Backlund tmb@mageia.org Cc: stable@vger.kernel.org Cc: Daniel Vetter daniel.vetter@ffwll.ch Cc: Sven Joachim svenjoac@gmx.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/nouveau/nouveau_ttm.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -169,7 +169,11 @@ nouveau_ttm_mmap(struct file *filp, stru struct nouveau_drm *drm = nouveau_drm(file_priv->minor->dev);
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) +#if defined(CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT) return drm_legacy_mmap(filp, vma); +#else + return -EINVAL; +#endif
return ttm_bo_mmap(filp, vma, &drm->ttm.bdev); }