diff options
Diffstat (limited to 'arch/arm/plat-omap/mailbox.c')
| -rw-r--r-- | arch/arm/plat-omap/mailbox.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c index e6b31159f08..2210c45a52f 100644 --- a/arch/arm/plat-omap/mailbox.c +++ b/arch/arm/plat-omap/mailbox.c @@ -31,6 +31,8 @@ static struct omap_mbox *mboxes; static DEFINE_RWLOCK(mboxes_lock); +static int mbox_configured; + /* Mailbox FIFO handle functions */ static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox) { @@ -266,13 +268,20 @@ static void mbox_queue_free(struct omap_mbox_queue *q) static int omap_mbox_startup(struct omap_mbox *mbox) { - int ret; + int ret = 0; struct omap_mbox_queue *mq; if (likely(mbox->ops->startup)) { - ret = mbox->ops->startup(mbox); - if (unlikely(ret)) + write_lock(&mboxes_lock); + if (!mbox_configured) + ret = mbox->ops->startup(mbox); + + if (unlikely(ret)) { + write_unlock(&mboxes_lock); return ret; + } + mbox_configured++; + write_unlock(&mboxes_lock); } ret = request_irq(mbox->irq, mbox_interrupt, IRQF_DISABLED, @@ -317,8 +326,14 @@ static void omap_mbox_fini(struct omap_mbox *mbox) free_irq(mbox->irq, mbox); - if (unlikely(mbox->ops->shutdown)) - mbox->ops->shutdown(mbox); + if (unlikely(mbox->ops->shutdown)) { + write_lock(&mboxes_lock); + if (mbox_configured > 0) + mbox_configured--; + if (!mbox_configured) + mbox->ops->shutdown(mbox); + write_unlock(&mboxes_lock); + } } static struct omap_mbox **find_mboxes(const char *name) |