hpsa: shorten the wait for the CISS doorbell mode change ack
hpsa: shorten the wait for the CISS doorbell mode change ack

Shorten the wait for the CISS configuration table doorbell mode
change acknowledgment from 300-600 s to 20 s, which is the value
specified in the CISS specification that should be honored by
all controllers.

Wait using interruptible msleep() rather than uninterruptible
usleep_range(), which triggers rt_sched timeout errors if the
wait is long.

Reviewed-by: Scott Teel <a7e0ce414fba0c6a771cbc0f20d6d2c5203e64ca@pmcs.com>
Signed-off-by: Robert Elliott <fcf6aac10c16bf4310224494560ff8cb9772fa2e@hp.com>
Signed-off-by: Don Brace <2492869e79b95109d0bee0fc4e8bb0141c1888c7@pmcs.com>
Signed-off-by: Christoph Hellwig <923f7720577207a44b32e59bbfbea59d27f1ae8e@lst.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs