| Log Message: |
add a knob that disables detection of write protected disks
It has been reported that on some systems (with real hardware passed
through to a virtual machine) the WP detection causes USB disk probing
failures.
While here, also fix the selection of the next state in the case
of malloc failure in DA_STATE_PROBE_WP. It was DA_STATE_PROBE_RC
unconditionally even when it should have been DA_STATE_PROBE_RC16.
PR: 225794
Reported by: David Boyd <David.Boyd49@twc.com>
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D18496
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head/sys/cam/scsi/scsi_da.c