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authorMing Lei <ming.lei@redhat.com>2023-09-01 21:49:16 +0800
committerJens Axboe <axboe@kernel.dk>2023-09-01 07:54:06 -0600
commitb484a40dc1f16edb58e5430105a021e1916e6f27 (patch)
tree83d03fb7a8cacab3b52f3b707def4a7960ff2894 /drivers/hid/hid-appleir.c
parentbd6fc5da4c51107e1e0cec4a3a07963d1dae2c84 (diff)
io_uring: fix IO hang in io_wq_put_and_exit from do_exit()
io_wq_put_and_exit() is called from do_exit(), but all FIXED_FILE requests in io_wq aren't canceled in io_uring_cancel_generic() called from do_exit(). Meantime io_wq IO code path may share resource with normal iopoll code path. So if any HIPRI request is submittd via io_wq, this request may not get resouce for moving on, given iopoll isn't possible in io_wq_put_and_exit(). The issue can be triggered when terminating 't/io_uring -n4 /dev/nullb0' with default null_blk parameters. Fix it by always cancelling all requests in io_wq by adding helper of io_uring_cancel_wq(), and this way is reasonable because io_wq destroying follows canceling requests immediately. Closes: https://lore.kernel.org/linux-block/3893581.1691785261@warthog.procyon.org.uk/ Reported-by: David Howells <dhowells@redhat.com> Cc: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20230901134916.2415386-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/hid/hid-appleir.c')
0 files changed, 0 insertions, 0 deletions