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| author | Joonwon Kang <joonwonkang@google.com> | 2026-04-21 13:46:51 +0300 |
|---|---|---|
| committer | Jassi Brar <jassisinghbrar@gmail.com> | 2026-05-18 21:34:45 +0300 |
| commit | c96c8a7404ef8ce434ffd0f07b00e1a493fff42d (patch) | |
| tree | 11d9320da9838411e54068c06fa207f3749aeb87 | |
| parent | b57d1a40bc43258372fa1f4d39305e093947a262 (diff) | |
| download | linux-c96c8a7404ef8ce434ffd0f07b00e1a493fff42d.tar.xz | |
mailbox: Clarify multi-thread is not supported in blocking mode
Unlike in non-blocking mode, multi-thread has not been supported in
blocking mode. This commit is to prevent clients from having wrong
assumption by explicitly specifying this fact to the API doc.
Signed-off-by: Joonwon Kang <joonwonkang@google.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
| -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). |