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 <[email protected]>
---
drivers/i2c/busses/i2c-stm32f7.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index e4aaeb2262d0..042386b4cabe 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -1554,6 +1554,8 @@ static irqreturn_t stm32f7_i2c_handle_isr_errs(struct
stm32f7_i2c_dev *i2c_dev,
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);
}
i2c_dev->master_mode = false;
@@ -1622,6 +1624,8 @@ 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 +1646,8 @@ 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
