Reduce size of the buffer to drain the dbg_q. Add a mutex for
dbg_q, and in HFI read validate the input buffer size prior
to copying the queue contents into the input buffer.
CRs-Fixed: 3477543
Change-Id: I2043f3db6189ebfc8b8ead8db0266a83bc94b6a2
Signed-off-by: Karthik Anantha Ram <quic_kartanan@quicinc.com>
d56214d30d