mirror-linux/drivers/gpu/drm/qxl
Matthew Auld b129ff30ac drm/qxl: handle NULL bo->resource in move callback
The ttm bo now initially has NULL bo->resource, and leaves the driver
the handle that. However it looks like we forgot to handle that for qxl.
It looks like this will just null-ptr-deref in qxl_bo_move(), if
bo->resource is NULL.

Fix this by calling move_null() if the new resource is TTM_PL_SYSTEM,
otherwise do the multi-hop sequence to ensure can safely call into
ttm_bo_move_memcpy(), since it might also need to clear the memory.
This should give the same behaviour as before.

Fixes: 1802537820 ("drm/ttm: stop allocating dummy resources during BO creation")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230208145319.397235-2-matthew.auld@intel.com
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
2023-02-23 10:29:14 +01:00
..
Kconfig
Makefile
qxl_cmd.c drm/qxl: stop using ttm_bo_wait 2022-12-19 09:50:06 +01:00
qxl_debugfs.c
qxl_dev.h
qxl_display.c
qxl_draw.c
qxl_drv.c
qxl_drv.h drm/ttm: merge ttm_bo_api.h and ttm_bo_driver.h v2 2022-12-06 12:54:14 +01:00
qxl_dumb.c
qxl_gem.c
qxl_image.c
qxl_ioctl.c
qxl_irq.c
qxl_kms.c
qxl_object.c
qxl_object.h
qxl_prime.c
qxl_release.c
qxl_ttm.c drm/qxl: handle NULL bo->resource in move callback 2023-02-23 10:29:14 +01:00