675a9a87a806d5146751730efb1e3da054f03eb5

Limit DIAG queue length to avoid memory lockup. In use-cases where all the cores are busy executing interrupt handlers and tasklets, work/processes might starve. To avoid memory being locked up in wmi buf queue which is processed in work ctxt, it is essential to limit the queue length. Since highest proportion of the WMI events processed in work ctxt are FW diag events, to avoid memory lock up, drop FW diag events when queue length threshold is reached. Change-Id: I1982eff5bea6b49c0e0b0987c439d2b7af04922e CRs-Fixed: 2785768
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