[PATCH v4 0/1] drm/xe: Prevent null pointer access in xe_migrate_copy

[Zhanjun Dong <zhanjun.dong@intel.com>]

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xe_migrate_copy designed to copy content of TTM resources. When source
resource is null, it will trigger a NULL pointer dereference in
xe_migrate_copy. To avoid this situation, update lacks source flag to
true for this case, the flag will trigger xe_migrate_clear rather than
xe_migrate_copy.

Fixes: 266c85885263 ("drm/xe/xe2: Handle flat ccs move for igfx.")
Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Changes from prior revs:
 v4:- Limit commit message within 75 characters per line
      Minor commit message changes
 v3:- Update commit message to include Fixes and issue stack trace
 v2:- Drop changes in xe_migrate_copy
      Update condition expression as suggested

Zhanjun Dong (1):
  drm/xe: Prevent null pointer access in xe_migrate_copy

 drivers/gpu/drm/xe/xe_bo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.34.1