[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>

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);