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6243a5dcdf
PD#SWPL-153788 Problem: kernel panic due to vq unreg but vpp still use pointer vq_dev. Solution: 1. ensure vq_dev is set and use in the same function. 2. use atomic operations to ensure read and write security. Verify: T3 Change-Id: I10b5ed305e9cfe5fd3c76758ca1cc93adba14f3b Signed-off-by: zhenteng.tian <zhenteng.tian@amlogic.com>