From: Amelie Delaunay Date: Fri, 20 Nov 2020 14:33:18 +0000 (+0100) Subject: dmaengine: stm32-dma: clean channel configuration when channel is freed X-Git-Tag: v5.11-rc1~79^2~24 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=5d4d4dfbda18063231a95dea28fdeab148f23301;p=linux-2.6-block.git dmaengine: stm32-dma: clean channel configuration when channel is freed When dma_channel_release is called, it means that the channel won't be used anymore with the configuration it had. To ensure a future client can safely use the channel after it has been released, clean the configuration done when channel was requested. Signed-off-by: Amelie Delaunay Link: https://lore.kernel.org/r/20201120143320.30367-3-amelie.delaunay@st.com Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 55a6bd381219..62501e5d9e9d 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -1220,6 +1220,8 @@ static void stm32_dma_free_chan_resources(struct dma_chan *c) pm_runtime_put(dmadev->ddev.dev); vchan_free_chan_resources(to_virt_chan(c)); + stm32_dma_clear_reg(&chan->chan_reg); + chan->threshold = 0; } static void stm32_dma_desc_free(struct virt_dma_desc *vdesc)