Merge tag 'mailbox-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar...

Pull mailbox updates from Jassi Brar:

 - core: fix NULL message handling and add API to query TX queue slots

 - test: resolve concurrency bugs, dangling IRQs, and memory leaks

 - dt-bindings: qcom: add Eliza IPCC

 - mtk: fix address calculation and pointer handling bugs

 - cix: resolve SCMI suspend timeouts

 - misc memory allocation optimizations and cleanups

* tag 'mailbox-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar/mailbox:
  mailbox: mailbox-test: make data_ready a per-instance variable
  mailbox: mailbox-test: initialize struct earlier
  mailbox: mailbox-test: don't free the reused channel
  mailbox: mailbox-test: handle channel errors consistently
  mailbox: update kdoc for struct mbox_controller
  mailbox: add sanity check for channel array
  mailbox: mailbox-test: free channels on probe error
  mailbox: prefix new constants with MBOX_
  dt-bindings: mailbox: qcom-ipcc: Document the Eliza Inter-Processor Communication Controller
  mailbox: cix: Add IRQF_NO_SUSPEND to mailbox interrupt
  mailbox: Fix NULL message support in mbox_send_message()
  mailbox: remove superfluous internal header
  mailbox: correct kdoc title for mbox_bind_client
  mailbox: test: really ignore optional memory resources
  mailbox: exynos: drop superfluous mbox setting per channel
  mailbox: mtk-cmdq: Fix CURR and END addr for task insert case
  mailbox: mtk-vcp-mailbox: Fix the return value in mtk_vcp_mbox_xlate()
  mailbox: hi6220: kzalloc + kcalloc to kzalloc
  mailbox: rockchip: kzalloc + kcalloc to kzalloc
  mailbox: add API to query available TX queue slots