v2.0.7
IB/SRP: Avoid blocking commands for dev_loss_tmo seconds if reconnecting fails

This patch is a slightly reworked version of a patch from Vu Pham.
IB/srp: Reduce failover time

The default value for tl_retry_count is changed from 7 into 3.
Hence with a qp->timedout value of 19 this patch reduces the
default transport layer timeout from about 60s to about 25s. The
purpose of this patch is to reduce the time needed for SCSI error
handling significantly and at the same time to avoid activating
the SCSI error handler on an IB path with a regular BER or due to
brief IB network congestion.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
v2.0.8
scsi_transport_srp: Avoid that failback can fail

Avoid that if reconnecting succeeds and the SCSI error handler later
on invokes eh_host_reset_handler that paths remain in the fail-fast
state and hence that failback fails.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
v2.0.9