diff options
| author | Rob Clark <rob@ti.com> | 2010-01-04 16:52:03 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2010-02-24 02:29:22 +0300 |
| commit | 8250a5c381cc6714a061a39cfd29d7453e8ad64b (patch) | |
| tree | 0127f143ac9715fbfe45b8ef0c1e4da34982f709 /arch/arm/plat-omap/mailbox.c | |
| parent | 4499ce42935db68debba0a2d2ab8280627e4b692 (diff) | |
| download | linux-8250a5c381cc6714a061a39cfd29d7453e8ad64b.tar.xz | |
omap2/3/4: mailbox: use dedicated work queue for handling mailbox rx interrupt
keventd_wq is a shared work-queue, and should not be used when we
need fast deterministic response. Instead mailbox driver should
use it's own private work-queue, with it's own thread, to ensure
that handling of RX interrupts are not delayed by other drivers.
The tasklet is still used for transmission of mbox messages.
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: C A Subramaniam <subramaniam.ca@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Acked-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/plat-omap/mailbox.c')
| -rw-r--r-- | arch/arm/plat-omap/mailbox.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c index 8e90633e4cb9..4229cec53140 100644 --- a/arch/arm/plat-omap/mailbox.c +++ b/arch/arm/plat-omap/mailbox.c @@ -28,6 +28,7 @@ #include <plat/mailbox.h> +static struct workqueue_struct *mboxd; static struct omap_mbox *mboxes; static DEFINE_RWLOCK(mboxes_lock); @@ -188,7 +189,7 @@ static void __mbox_rx_interrupt(struct omap_mbox *mbox) /* no more messages in the fifo. clear IRQ source. */ ack_mbox_irq(mbox, IRQ_RX); nomem: - schedule_work(&mbox->rxq->work); + queue_work(mboxd, &mbox->rxq->work); } static irqreturn_t mbox_interrupt(int irq, void *p) @@ -401,12 +402,17 @@ EXPORT_SYMBOL(omap_mbox_unregister); static int __init omap_mbox_init(void) { + mboxd = create_workqueue("mboxd"); + if (!mboxd) + return -ENOMEM; + return 0; } module_init(omap_mbox_init); static void __exit omap_mbox_exit(void) { + destroy_workqueue(mboxd); } module_exit(omap_mbox_exit); |