[PATCH] s390: dasd driver.
From: Martin Schwidefsky <schwidefsky@de.ibm.com> dasd device driver changes: - After a state change interrupt restart all running i/o on queue and reset device timer. - Improve some debug messages. - Lower timeout of reserve/release/steal_lock to 2 seconds. - Fix BIODASDPSRD ioctl. - Replace ro_flag, use_diag_flag and disconnect_error_flag words by bits. - Use BLKPG_DEL_PARTITION ioctl instead of a call to delete_partition because delete_partition is not an exported function. Since dasd_destroy_partitions can't do blkdev_get because dasd_open would fail, keep the block device open as long as partitions exist. This in turn requires a different approach to the open vs. offline race.
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