linux-kernel - [PATCH 1/5] drm/msm: remove unnecessary mmap logic for cached BOs

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Message-Id: <20210423190833.25319-2-jonathan@marek.ca>
Date:   Fri, 23 Apr 2021 15:08:17 -0400
From:   Jonathan Marek <jonathan@...ek.ca>
To:     freedreno@...ts.freedesktop.org
Cc:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
        GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 1/5] drm/msm: remove unnecessary mmap logic for cached BOs

No one knows what this is for anymore, so just remove it.

Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
---
 drivers/gpu/drm/msm/msm_gem.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index b199942266a2..09abda42d764 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -207,21 +207,12 @@ int msm_gem_mmap_obj(struct drm_gem_object *obj,
 	vma->vm_flags &= ~VM_PFNMAP;
 	vma->vm_flags |= VM_MIXEDMAP;
 
-	if (msm_obj->flags & MSM_BO_WC) {
+	if (msm_obj->flags & MSM_BO_WC)
 		vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
-	} else if (msm_obj->flags & MSM_BO_UNCACHED) {
+	else if (msm_obj->flags & MSM_BO_UNCACHED)
 		vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
-	} else {
-		/*
-		 * Shunt off cached objs to shmem file so they have their own
-		 * address_space (so unmap_mapping_range does what we want,
-		 * in particular in the case of mmap'd dmabufs)
-		 */
-		vma->vm_pgoff = 0;
-		vma_set_file(vma, obj->filp);
-
+	else
 		vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
-	}
 
 	return 0;
 }
-- 
2.26.1