[PATCH v7 1/3] mailbox: Make startup and shutdown ops optional
From: Bjorn Andersson <hidden>
Date: 2017-05-27 23:14:12
Also in:
linux-arm-msm, lkml
Subsystem:
mailbox api, the rest · Maintainers:
Jassi Brar, Linus Torvalds
Some mailbox hardware doesn't have to perform any additional operations on startup of shutdown, so make these optional. Signed-off-by: Bjorn Andersson <redacted> --- Changes since v6: - None drivers/mailbox/mailbox.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 9dfbf7ea10a2..537f4f6d009b 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c@@ -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);
--
2.12.0
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