This is a note to let you know that I've just added the patch titled
drm/shmem-helper: Add missing vunmap on error
to the 5.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-shmem-helper-add-missing-vunmap-on-error.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From df4aaf015775221dde8a51ee09edb919981f091e Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Date: Thu, 30 Jun 2022 23:00:57 +0300
Subject: drm/shmem-helper: Add missing vunmap on error
From: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
commit df4aaf015775221dde8a51ee09edb919981f091e upstream.
The vmapping of dma-buf may succeed, but DRM SHMEM rejects the IOMEM
mapping, and thus, drm_gem_shmem_vmap_locked() should unvmap the IOMEM
before erroring out.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 49a3f51dfeee ("drm/gem: Use struct dma_buf_map in GEM vmap ops and convert GEM backends")
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220630200058.1883506-2-dmitry.osipenko@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_gem_shmem_helper.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/drm_gem_shmem_helper.c
+++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
@@ -302,6 +302,7 @@ static int drm_gem_shmem_vmap_locked(str
ret = dma_buf_vmap(obj->import_attach->dmabuf, map);
if (!ret) {
if (WARN_ON(map->is_iomem)) {
+ dma_buf_vunmap(obj->import_attach->dmabuf, map);
ret = -EIO;
goto err_put_pages;
}
Patches currently in stable-queue which might be from dmitry.osipenko@xxxxxxxxxxxxx are
queue-5.19/drm-tegra-fix-vmapping-of-prime-buffers.patch
queue-5.19/drm-shmem-helper-add-missing-vunmap-on-error.patch
queue-5.19/drm-gem-properly-annotate-ww-context-on-drm_gem_lock_reservations-error.patch
