summaryrefslogtreecommitdiff
path: root/arch/arm/plat-omap/mailbox.c
diff options
context:
space:
mode:
authorKanigeri, Hari <h-kanigeri2@ti.com>2010-11-29 23:24:13 +0300
committerHari Kanigeri <h-kanigeri2@ti.com>2010-12-02 14:43:16 +0300
commita42743c26a53a2a5f2b2018a9659ab3fb604d5bc (patch)
treef25f038eeed91eb7b9e66ad9cc2b071657823837 /arch/arm/plat-omap/mailbox.c
parentab66ac3007cb3e59fe80dfcf36aff243d3008cb9 (diff)
downloadlinux-a42743c26a53a2a5f2b2018a9659ab3fb604d5bc.tar.xz
OMAP: mailbox: send message in process context
Schedule the Tasklet to send only when mailbox fifo is full and there are pending messages in kfifo, else send the message directly in the Process context. This would avoid needless scheduling of Tasklet for every message transfer Signed-off-by: Hari Kanigeri <h-kanigeri2@ti.com> Acked-by: Hiroshi Doyu <hiroshi.doyu@nokia.com>
Diffstat (limited to 'arch/arm/plat-omap/mailbox.c')
-rw-r--r--arch/arm/plat-omap/mailbox.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index d9aa87c0a921..cc58b44325f2 100644
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -92,20 +92,25 @@ int omap_mbox_msg_send(struct omap_mbox *mbox, mbox_msg_t msg)
struct omap_mbox_queue *mq = mbox->txq;
int ret = 0, len;
- spin_lock(&mq->lock);
+ spin_lock_bh(&mq->lock);
if (kfifo_avail(&mq->fifo) < sizeof(msg)) {
ret = -ENOMEM;
goto out;
}
+ if (kfifo_is_empty(&mq->fifo) && !__mbox_poll_for_space(mbox)) {
+ mbox_fifo_write(mbox, msg);
+ goto out;
+ }
+
len = kfifo_in(&mq->fifo, (unsigned char *)&msg, sizeof(msg));
WARN_ON(len != sizeof(msg));
tasklet_schedule(&mbox->txq->tasklet);
out:
- spin_unlock(&mq->lock);
+ spin_unlock_bh(&mq->lock);
return ret;
}
EXPORT_SYMBOL(omap_mbox_msg_send);