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| author | Cornelia Huck | 2006-06-29 15:08:41 +0200 |
|---|---|---|
| committer | Martin Schwidefsky | 2006-06-29 15:08:41 +0200 |
| commit | 94bb063312d872d9269deb2e5c0c7c6d5b0318e1 (patch) | |
| tree | bef899fbe742ee31d93ff0e077898d4562086f9e /drivers/s390/cio/device_fsm.c | |
| parent | [S390] appldata enhancements. (diff) | |
| download | kernel-qcow2-linux-94bb063312d872d9269deb2e5c0c7c6d5b0318e1.tar.gz kernel-qcow2-linux-94bb063312d872d9269deb2e5c0c7c6d5b0318e1.tar.xz kernel-qcow2-linux-94bb063312d872d9269deb2e5c0c7c6d5b0318e1.zip | |
[S390] rework of channel measurement facility.
Fixes for several channel measurement facility bugs:
* Blocks copied from the hardware might not be consistent. Solve this
by moving the copying into idle state and repeating the copying.
* avg_sample_interval changed with every read, even though no new block
was available. Solve this by storing a timestamp when the last new
block was received.
* Several locking issues.
* Measurements were not reenabled after a disconnected device became
available again.
* Remove #defines for ioctls that were never implemented.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/device_fsm.c')
| -rw-r--r-- | drivers/s390/cio/device_fsm.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index 5ec8ef1df9fa..7d0dd72635eb 100644 --- a/drivers/s390/cio/device_fsm.c +++ b/drivers/s390/cio/device_fsm.c @@ -336,8 +336,11 @@ ccw_device_oper_notify(void *data) if (!ret) /* Driver doesn't want device back. */ ccw_device_do_unreg_rereg((void *)cdev); - else + else { + /* Reenable channel measurements, if needed. */ + cmf_reenable(cdev); wake_up(&cdev->private->wait_q); + } } /* @@ -1095,6 +1098,13 @@ ccw_device_change_cmfstate(struct ccw_device *cdev, enum dev_event dev_event) dev_fsm_event(cdev, dev_event); } +static void ccw_device_update_cmfblock(struct ccw_device *cdev, + enum dev_event dev_event) +{ + cmf_retry_copy_block(cdev); + cdev->private->state = DEV_STATE_ONLINE; + dev_fsm_event(cdev, dev_event); +} static void ccw_device_quiesce_done(struct ccw_device *cdev, enum dev_event dev_event) @@ -1249,6 +1259,12 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = { [DEV_EVENT_TIMEOUT] = ccw_device_change_cmfstate, [DEV_EVENT_VERIFY] = ccw_device_change_cmfstate, }, + [DEV_STATE_CMFUPDATE] = { + [DEV_EVENT_NOTOPER] = ccw_device_update_cmfblock, + [DEV_EVENT_INTERRUPT] = ccw_device_update_cmfblock, + [DEV_EVENT_TIMEOUT] = ccw_device_update_cmfblock, + [DEV_EVENT_VERIFY] = ccw_device_update_cmfblock, + }, }; /* |