diff options
Diffstat (limited to 'drivers/dma/dw/core.c')
| -rw-r--r-- | drivers/dma/dw/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index 7ab83fe601ed..19a23767533a 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -982,8 +982,11 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan) dev_vdbg(chan2dev(chan), "%s\n", __func__); + pm_runtime_get_sync(dw->dma.dev); + /* ASSERT: channel is idle */ if (dma_readl(dw, CH_EN) & dwc->mask) { + pm_runtime_put_sync_suspend(dw->dma.dev); dev_dbg(chan2dev(chan), "DMA channel not idle?\n"); return -EIO; } @@ -1000,6 +1003,7 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan) * We need controller-specific data to set up slave transfers. */ if (chan->private && !dw_dma_filter(chan, chan->private)) { + pm_runtime_put_sync_suspend(dw->dma.dev); dev_warn(chan2dev(chan), "Wrong controller-specific data\n"); return -EINVAL; } @@ -1043,6 +1047,8 @@ static void dwc_free_chan_resources(struct dma_chan *chan) if (!dw->in_use) do_dw_dma_off(dw); + pm_runtime_put_sync_suspend(dw->dma.dev); + dev_vdbg(chan2dev(chan), "%s: done\n", __func__); } |