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dmaengine: cpp41: Fix handling of error path

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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 <johan@kernel.org>. This is to keep the PM runtime
use counts happy.

Fixes: fdea2d09b9 ("dmaengine: cppi41: Add basic PM runtime support")
Cc: Johan Hovold <johan@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Tony Lindgren 2016-11-11 11:28:52 -08:00 committed by Vinod Koul
parent 098de42ad6
commit 740b4be3f7
1 changed files with 9 additions and 2 deletions
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11
drivers/dma/cppi41.c
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@ -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);