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f2450f8a2c
After applying -Wmaybe-uninitialized manually, two build warnings are triggered: drivers/block/ublk_drv.c:940:11: warning: ‘io’ may be used uninitialized [-Wmaybe-uninitialized] 940 | io->flags &= ~UBLK_IO_FLAG_ACTIVE; drivers/block/ublk_drv.c: In function ‘ublk_ctrl_uring_cmd’: drivers/block/ublk_drv.c:1531:9: warning: ‘ret’ may be used uninitialized [-Wmaybe-uninitialized] Fix the 1st one by removing 'io->flags &= ~UBLK_IO_FLAG_ACTIVE;' which isn't needed since the function always return successfully after setting this flag. Fix the 2nd one by always initializing 'ret'. Also fix another sparse warning of 'sparse: sparse: incorrect type in return expression' by changing return type of ublk_setup_iod(). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20220716095344.222674-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>