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[ Upstream commit 1cee2975bbabd89df1097c354867192106b058ea ]
Add the internal logic to check for autoquiesce triggers and handle
them.
Quiesce and resume are functions that tell Linux to stop/resume
issuing I/Os to a specific DASD.
The DASD driver allows a manual quiesce/resume via ioctl.
Autoquiesce will define an amount of triggers that will lead to
an automatic quiesce if a certain event occurs.
There is no automatic resume.
All events will be reported via DASD Extended Error Reporting (EER)
if configured.
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Link: https://lore.kernel.org/r/20230405142017.2446986-3-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: c3116e62ddef ("s390/dasd: fix double module refcount decrement")
Signed-off-by: Sasha Levin <sashal@kernel.org>
3404d535bd