On Thu, Apr 03, 2025 at 05:26:33PM +0300, Dmitry Osipenko wrote:
We switched to use refcount_t for vmaps and missed to change the vunmap code to properly unset the vmap pointer, which is now cleared while vmap's refcount > 0. Clear the cached vmap pointer only when refcounting drops to zero to fix the bug.Fixes: e1fc39a92332 ("drm/shmem-helper: Use refcount_t for vmap_use_count") Reported-by: Lucas De Marchi <[email protected]> Closes: https://lore.kernel.org/dri-devel/[email protected]/T/#m3dca6d81bedc8d6146a56b82694624fbc6fa4c96 Signed-off-by: Dmitry Osipenko <[email protected]>
Tested-by: Lucas De Marchi <[email protected]> this fixes it for me when using `qemu ... -device cirrus-vga` thanks Lucas De Marchi
