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| -rw-r--r-- | drivers/mailbox/mailbox.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c index bbc9fd75a95f..b00f7a32e866 100644 --- a/drivers/mailbox/mailbox.c +++ b/drivers/mailbox/mailbox.c @@ -258,6 +258,10 @@ EXPORT_SYMBOL_GPL(mbox_chan_tx_slots_available); * over the chan, i.e, tx_done() is made. * This function could be called from atomic context as it simply * queues the data and returns a token against the request. + * In blocking mode, it is caller's responsibility to serialize threads' + * access to a channel if multi-threads are to send messages through the + * same channel, i.e. caller should not call this function until any + * previous call returns. * * Return: Non-negative integer for successful submission (non-blocking mode) * or transmission over chan (blocking mode). |