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Use this mechanims in xlnx r5 remoteproc driver. Changes in v4: - %s/msg_slot_ro/tx_slots_avail_ro/ - do not use msg_count to calculate tx_slots_avail_ro instead modify it directly - separate xlnx remoteproc driver patch in to two patches Changes in v3: - move msg_slot_ro to mbox_client instead of mbox_chan - allocate separate mailbox client to the "tx" mbox channel - modify rest of the patch to use msg_slot_ro from mbox_client Changes in v2: - Split patchset in two patches for two different subsystems. - Change design and introduce new field per channel to track mbox queue length. - use this new field in xlnx remoteproc driver to prevent sending new messages if no slots available in the mbox tx channel queue. Tanmay Shah (3): mailbox: check mailbox queue is full or not remoteproc: xlnx: assign mbox client per mbox channel remoteproc: xlnx: do not send new mbox notification drivers/mailbox/mailbox.c | 3 +++ drivers/remoteproc/xlnx_r5_remoteproc.c | 26 +++++++++++++++++++------ include/linux/mailbox_client.h | 2 ++ 3 files changed, 25 insertions(+), 6 deletions(-) base-commit: fa3e2d1dc10864887674c484372a9ccc6a01eb18 -- 2.34.1