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We also need to consider the size of large firmware commands in iwm_alloc_tx_ring(), in the dma tag creation, when qid == IWM_MVM_CMD_QUEUE. The old code apparently only allocated a 2KB (MCLBYTES) sized buffer when it actually expected 4KB. Submitted by: Imre Vadasz <imre@vdsz.com> Approved by: re (gjb) Differential Revision: https://reviews.freebsd.org/D6824