diff options
| author | Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | 2010-02-18 09:48:55 +0300 |
|---|---|---|
| committer | Hiroshi DOYU <Hiroshi.DOYU@nokia.com> | 2010-08-04 16:50:16 +0400 |
| commit | 72b917ef90084885ffcc5adb69095af02d2b6996 (patch) | |
| tree | 69faf94c1eb1a00e5e4e713e40993100e8dacd80 /arch/arm/plat-omap/mailbox.c | |
| parent | 9caae4d87ca0087edd6c02efd674f13fe0419ee9 (diff) | |
| download | linux-72b917ef90084885ffcc5adb69095af02d2b6996.tar.xz | |
Mailbox: new mutext lock for h/w mailbox configuration
mailbox startup and shutdown are being executed against
a single H/W module, and a mailbox H/W module is totally
__independent__ of the registration of logical mailboxes.
So, an independent mutext should be used for startup and
shutdown.
Signed-off-by: Fernando Guzman Lugo <x0095840@ti.com>
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Diffstat (limited to 'arch/arm/plat-omap/mailbox.c')
| -rw-r--r-- | arch/arm/plat-omap/mailbox.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c index 72efbe5be578..986002b089fd 100644 --- a/arch/arm/plat-omap/mailbox.c +++ b/arch/arm/plat-omap/mailbox.c @@ -34,6 +34,7 @@ static struct omap_mbox *mboxes; static DEFINE_RWLOCK(mboxes_lock); static int mbox_configured; +static DEFINE_MUTEX(mbox_configured_lock); /* Mailbox FIFO handle functions */ static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox) @@ -250,16 +251,16 @@ static int omap_mbox_startup(struct omap_mbox *mbox) struct omap_mbox_queue *mq; if (likely(mbox->ops->startup)) { - write_lock(&mboxes_lock); + mutex_lock(&mbox_configured_lock); if (!mbox_configured) ret = mbox->ops->startup(mbox); if (unlikely(ret)) { - write_unlock(&mboxes_lock); + mutex_unlock(&mbox_configured_lock); return ret; } mbox_configured++; - write_unlock(&mboxes_lock); + mutex_unlock(&mbox_configured_lock); } ret = request_irq(mbox->irq, mbox_interrupt, IRQF_SHARED, @@ -306,12 +307,12 @@ static void omap_mbox_fini(struct omap_mbox *mbox) mbox_queue_free(mbox->rxq); if (unlikely(mbox->ops->shutdown)) { - write_lock(&mboxes_lock); + mutex_lock(&mbox_configured_lock); if (mbox_configured > 0) mbox_configured--; if (!mbox_configured) mbox->ops->shutdown(mbox); - write_unlock(&mboxes_lock); + mutex_unlock(&mbox_configured_lock); } } |