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| author | Amelie Delaunay <amelie.delaunay@st.com> | 2020-11-20 15:33:18 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-12-11 16:43:08 +0100 |
| commit | 5d4d4dfbda18063231a95dea28fdeab148f23301 (patch) | |
| tree | 690625bf55454041b52c1ec3778bca80b4c9590d /drivers/dma | |
| parent | dmaengine: stm32-dma: rework irq handler to manage error before xfer events (diff) | |
| download | linux-5d4d4dfbda18063231a95dea28fdeab148f23301.tar.xz linux-5d4d4dfbda18063231a95dea28fdeab148f23301.zip | |
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 <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/20201120143320.30367-3-amelie.delaunay@st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/stm32-dma.c | 2 |
1 files changed, 2 insertions, 0 deletions
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) |