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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-02-28 12:07:48 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-03-07 09:52:23 +0100 |
| commit | 4fa3c019640ef776e393345ed35d9ec5c51aa3c1 (patch) | |
| tree | 496a04beb012b9111f3735dbf3cf14a5861b71bd /drivers/s390/block/scm_blk.h | |
| parent | s390/scm_drv: extend notify callback (diff) | |
| download | linux-dev-4fa3c019640ef776e393345ed35d9ec5c51aa3c1.tar.xz linux-dev-4fa3c019640ef776e393345ed35d9ec5c51aa3c1.zip | |
s390/scm_blk: suspend writes
Stop writing to scm after certain error conditions such as a concurrent
firmware upgrade. Resume to normal state once scm_blk_set_available is
called (due to an scm availability notification).
Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/scm_blk.h')
| -rw-r--r-- | drivers/s390/block/scm_blk.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/block/scm_blk.h b/drivers/s390/block/scm_blk.h index 3c1ccf494647..8b387b32fd62 100644 --- a/drivers/s390/block/scm_blk.h +++ b/drivers/s390/block/scm_blk.h @@ -21,6 +21,7 @@ struct scm_blk_dev { spinlock_t rq_lock; /* guard the request queue */ spinlock_t lock; /* guard the rest of the blockdev */ atomic_t queued_reqs; + enum {SCM_OPER, SCM_WR_PROHIBIT} state; struct list_head finished_requests; #ifdef CONFIG_SCM_BLOCK_CLUSTER_WRITE struct list_head cluster_list; @@ -48,6 +49,7 @@ struct scm_request { int scm_blk_dev_setup(struct scm_blk_dev *, struct scm_device *); void scm_blk_dev_cleanup(struct scm_blk_dev *); +void scm_blk_set_available(struct scm_blk_dev *); void scm_blk_irq(struct scm_device *, void *, int); void scm_request_finish(struct scm_request *); |