[PATCH 2/3] i2c: stm32f7: unmap DMA mapped buffer

[Clément Le Goffic]

Fix an issue where the mapped DMA buffer was not unmapped.

Fixes: 7ecc8cfde553 ("i2c: i2c-stm32f7: Add DMA support")
Signed-off-by: Clément Le Goffic <clement.legof...@foss.st.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 973a3a8c6d4a..a05cac5ee9db 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -1622,6 +1622,8 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, 
void *data)
                if (i2c_dev->use_dma) {
                        stm32f7_i2c_disable_dma_req(i2c_dev);
                        dmaengine_terminate_async(dma->chan_using);
+                       dma_unmap_single(i2c_dev->dev, dma->dma_buf, 
dma->dma_len,
+                                        dma->dma_data_dir);
                }
                f7_msg->result = -ENXIO;
        }
@@ -1642,6 +1644,8 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, 
void *data)
                                dev_dbg(i2c_dev->dev, "<%s>: Timed out\n", 
__func__);
                                stm32f7_i2c_disable_dma_req(i2c_dev);
                                dmaengine_terminate_async(dma->chan_using);
+                               dma_unmap_single(i2c_dev->dev, dma->dma_buf, 
dma->dma_len,
+                                                dma->dma_data_dir);
                                f7_msg->result = -ETIMEDOUT;
                        }
                }

-- 
2.43.0