diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 1d7bba434225..0b260484b4f5 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1336,6 +1336,14 @@ void spi_finalize_current_transfer(struct spi_controller *ctlr) } EXPORT_SYMBOL_GPL(spi_finalize_current_transfer); +static void spi_idle_runtime_pm(struct spi_controller *ctlr) +{ + if (ctlr->auto_runtime_pm) { + pm_runtime_mark_last_busy(ctlr->dev.parent); + pm_runtime_put_autosuspend(ctlr->dev.parent); + } +} + /** * __spi_pump_messages - function which processes spi message queue * @ctlr: controller to process queue for @@ -1380,10 +1388,17 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread) return; } - /* Only do teardown in the thread */ + /* Defer any non-atomic teardown to the thread */ if (!in_kthread) { - kthread_queue_work(ctlr->kworker, - &ctlr->pump_messages); + if (!ctlr->dummy_rx && !ctlr->dummy_tx && + !ctlr->unprepare_transfer_hardware) { + spi_idle_runtime_pm(ctlr); + ctlr->busy = false; + trace_spi_controller_idle(ctlr); + } else { + kthread_queue_work(ctlr->kworker, + &ctlr->pump_messages); + } spin_unlock_irqrestore(&ctlr->queue_lock, flags); return; } @@ -1400,10 +1415,7 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread) ctlr->unprepare_transfer_hardware(ctlr)) dev_err(&ctlr->dev, "failed to unprepare transfer hardware\n"); - if (ctlr->auto_runtime_pm) { - pm_runtime_mark_last_busy(ctlr->dev.parent); - pm_runtime_put_autosuspend(ctlr->dev.parent); - } + spi_idle_runtime_pm(ctlr); trace_spi_controller_idle(ctlr); spin_lock_irqsave(&ctlr->queue_lock, flags); |