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| author | Stefan Weinhuber <wein@de.ibm.com> | 2009-12-07 12:51:51 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2009-12-07 12:51:34 +0100 |
| commit | eb6e199bef288611157b8198c25d12b32bf058d0 (patch) | |
| tree | 80737a2703a9f4d09cee2410342aeccb281413ae /drivers/s390/block/dasd_ioctl.c | |
| parent | [S390] dasd: enable prefix independent of pav support (diff) | |
| download | linux-eb6e199bef288611157b8198c25d12b32bf058d0.tar.xz linux-eb6e199bef288611157b8198c25d12b32bf058d0.zip | |
[S390] dasd: improve error recovery for internal I/O
Most of the error conditions reported by a FICON storage server
indicate situations which can be recovered. Sometimes the host just
needs to retry an I/O request, but sometimes the recovery
is more complex and requires the device driver to wait, choose
a different path, etc.
The DASD device driver has a fully featured error recovery
for normal block layer I/O, but not for internal I/O request which
are for example used during the device bring up.
This can lead to situations where the IPL of a system fails because
DASD devices are not properly recognized.
This patch will extend the internal I/O handling to use the existing
error recovery procedures.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/block/dasd_ioctl.c')
| -rw-r--r-- | drivers/s390/block/dasd_ioctl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c index f756a1b0c57a..478bcdb90b6f 100644 --- a/drivers/s390/block/dasd_ioctl.c +++ b/drivers/s390/block/dasd_ioctl.c @@ -101,7 +101,7 @@ static int dasd_ioctl_quiesce(struct dasd_block *block) pr_info("%s: The DASD has been put in the quiesce " "state\n", dev_name(&base->cdev->dev)); spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); - base->stopped |= DASD_STOPPED_QUIESCE; + dasd_device_set_stop_bits(base, DASD_STOPPED_QUIESCE); spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); return 0; } @@ -122,7 +122,7 @@ static int dasd_ioctl_resume(struct dasd_block *block) pr_info("%s: I/O operations have been resumed " "on the DASD\n", dev_name(&base->cdev->dev)); spin_lock_irqsave(get_ccwdev_lock(base->cdev), flags); - base->stopped &= ~DASD_STOPPED_QUIESCE; + dasd_device_remove_stop_bits(base, DASD_STOPPED_QUIESCE); spin_unlock_irqrestore(get_ccwdev_lock(base->cdev), flags); dasd_schedule_block_bh(block); |