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mailbox: Make startup and shutdown ops optional 

Some mailbox hardware doesn't have to perform any additional operations
on startup of shutdown, so make these optional.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Bjorn Andersson 2017-05-27 16:14:02 -07:00 committed by Jassi Brar
parent 63f700aab4
commit b7133d6fcd
1 changed files with 10 additions and 6 deletions
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16
drivers/mailbox/mailbox.c
View File

@ -355,11 +355,14 @@ struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index)
spin_unlock_irqrestore(&chan->lock, flags);
ret = chan->mbox->ops->startup(chan);
if (ret) {
dev_err(dev, "Unable to startup the chan (%d)\n", ret);
mbox_free_channel(chan);
chan = ERR_PTR(ret);
if (chan->mbox->ops->startup) {
ret = chan->mbox->ops->startup(chan);
if (ret) {
dev_err(dev, "Unable to startup the chan (%d)\n", ret);
mbox_free_channel(chan);
chan = ERR_PTR(ret);
}
}
mutex_unlock(&con_mutex);
@ -408,7 +411,8 @@ void mbox_free_channel(struct mbox_chan *chan)
if (!chan || !chan->cl)
return;
chan->mbox->ops->shutdown(chan);
if (chan->mbox->ops->shutdown)
chan->mbox->ops->shutdown(chan);
/* The queued TX requests are simply aborted, no callbacks are made */
spin_lock_irqsave(&chan->lock, flags);