>From 0d91b155a7f9c1f4a2b360bc2b79dc728aee8b48 Mon Sep 17 00:00:00 2001 From: Thomas Backlund Date: Sat, 15 Jun 2019 12:22:44 +0300 Subject: [PATCH] nouveau: Fix build with CONFIG_NOUVEAU_LEGACY_CTX_SUPPORT disabled 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 Cc: stable@vger.kernel.org Cc: Daniel Vetter Cc: Sven Joachim --- drivers/gpu/drm/nouveau/nouveau_ttm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c index 1543c2f8d3d3..05d513d54555 100644 --- 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, struct vm_area_struct *vma) 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); } -- 2.21.0