batch io is designed to be independent of task context, and we will not
track task context for batch io feature.

Reviewed-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 drivers/block/ublk_drv.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 1fcca52591c3..c62b2f2057fe 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -2254,7 +2254,10 @@ static int __ublk_fetch(struct io_uring_cmd *cmd, struct ublk_device *ub,
 
 	ublk_fill_io_cmd(io, cmd);
 
-	WRITE_ONCE(io->task, get_task_struct(current));
+	if (ublk_dev_support_batch_io(ub))
+		WRITE_ONCE(io->task, NULL);
+	else
+		WRITE_ONCE(io->task, get_task_struct(current));
 	ublk_mark_io_ready(ub);
 
 	return 0;
-- 
2.47.0