3.5.7.15 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Rabin Vincent <[email protected]> commit 9ecb41bd8cf002fd8f3e063db4df81647ddd623c upstream. The pm runtime reference counting of the driver is broken for the case when there is more than one transfer queued, leading to the device being runtime suspend while active. Fix it. Signed-off-by: Rabin Vincent <[email protected]> Acked-by: Linus Walleij <[email protected]> Signed-off-by: Vinod Koul <[email protected]> [ luis: backport to 3.5: adjust context ] Signed-off-by: Luis Henriques <[email protected]> --- drivers/dma/ste_dma40.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index 000d309..aec952f 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -1393,10 +1393,13 @@ static void dma_tc_handle(struct d40_chan *d40c) return; } - if (d40_queue_start(d40c) == NULL) + if (d40_queue_start(d40c) == NULL) { d40c->busy = false; - pm_runtime_mark_last_busy(d40c->base->dev); - pm_runtime_put_autosuspend(d40c->base->dev); + + pm_runtime_mark_last_busy(d40c->base->dev); + pm_runtime_put_autosuspend(d40c->base->dev); + } + } d40c->pending_tx++; -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
