From 740b4be3f742100ea66f0f9ee9715b10ee304a90 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Fri, 11 Nov 2016 11:28:52 -0800 Subject: [PATCH] dmaengine: cpp41: Fix handling of error path If we return early on pm_runtime_get() error, we need to also call pm_runtime_put_noidle() as pointed out in a musb related thread by Johan Hovold . This is to keep the PM runtime use counts happy. Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support") Cc: Johan Hovold Signed-off-by: Tony Lindgren Signed-off-by: Vinod Koul --- drivers/dma/cppi41.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c index 3d2d8b5a6c91..4b52126c13cf 100644 --- a/drivers/dma/cppi41.c +++ b/drivers/dma/cppi41.c @@ -366,8 +366,11 @@ static int cppi41_dma_alloc_chan_resources(struct dma_chan *chan) int error; error = pm_runtime_get_sync(cdd->ddev.dev); - if (error < 0) + if (error < 0) { + pm_runtime_put_noidle(cdd->ddev.dev); + return error; + } dma_cookie_init(chan); dma_async_tx_descriptor_init(&c->txd, chan); @@ -389,8 +392,11 @@ static void cppi41_dma_free_chan_resources(struct dma_chan *chan) int error; error = pm_runtime_get_sync(cdd->ddev.dev); - if (error < 0) + if (error < 0) { + pm_runtime_put_noidle(cdd->ddev.dev); + return; + } WARN_ON(!list_empty(&cdd->pending)); @@ -466,6 +472,7 @@ static void cppi41_dma_issue_pending(struct dma_chan *chan) error = pm_runtime_get(cdd->ddev.dev); if ((error != -EINPROGRESS) && error < 0) { + pm_runtime_put_noidle(cdd->ddev.dev); dev_err(cdd->ddev.dev, "Failed to pm_runtime_get: %i\n", error); -- 2.20.1