From 1229f82deaece681cda664d95c856b68062aa159 Mon Sep 17 00:00:00 2001 From: Alain Volmat Date: Mon, 20 Sep 2021 17:21:32 +0200 Subject: i2c: stm32f7: use proper DMAENGINE API for termination dmaengine_terminate_all() is deprecated in favor of explicitly saying if it should be sync or async. Here, we use dmaengine_terminate_sync in i2c_xfer and i2c_smbus_xfer handlers and rely on dmaengine_terminate_async within interrupt handlers (transmission error cases). dmaengine_synchronize is added within i2c_xfer and i2c_smbus_xfer handler to finalize terminate started in interrupt handlers. Signed-off-by: Alain Volmat Reviewed-by: Pierre-Yves MORDRET Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-stm32f7.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index 50d5ae81d227..66145d2b9b55 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1521,7 +1521,7 @@ static irqreturn_t stm32f7_i2c_isr_event(int irq, void *data) writel_relaxed(STM32F7_I2C_ICR_NACKCF, base + STM32F7_I2C_ICR); if (i2c_dev->use_dma) { stm32f7_i2c_disable_dma_req(i2c_dev); - dmaengine_terminate_all(dma->chan_using); + dmaengine_terminate_async(dma->chan_using); } f7_msg->result = -ENXIO; } @@ -1588,7 +1588,7 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data) if (!ret) { dev_dbg(i2c_dev->dev, "<%s>: Timed out\n", __func__); stm32f7_i2c_disable_dma_req(i2c_dev); - dmaengine_terminate_all(dma->chan_using); + dmaengine_terminate_async(dma->chan_using); f7_msg->result = -ETIMEDOUT; } @@ -1665,7 +1665,7 @@ static irqreturn_t stm32f7_i2c_isr_error(int irq, void *data) /* Disable dma */ if (i2c_dev->use_dma) { stm32f7_i2c_disable_dma_req(i2c_dev); - dmaengine_terminate_all(dma->chan_using); + dmaengine_terminate_async(dma->chan_using); } i2c_dev->master_mode = false; @@ -1702,6 +1702,9 @@ static int stm32f7_i2c_xfer(struct i2c_adapter *i2c_adap, i2c_dev->adap.timeout); ret = f7_msg->result; if (ret) { + if (i2c_dev->use_dma) + dmaengine_synchronize(dma->chan_using); + /* * It is possible that some unsent data have already been * written into TXDR. To avoid sending old data in a @@ -1716,7 +1719,7 @@ static int stm32f7_i2c_xfer(struct i2c_adapter *i2c_adap, dev_dbg(i2c_dev->dev, "Access to slave 0x%x timed out\n", i2c_dev->msg->addr); if (i2c_dev->use_dma) - dmaengine_terminate_all(dma->chan_using); + dmaengine_terminate_sync(dma->chan_using); stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; } @@ -1761,6 +1764,9 @@ static int stm32f7_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, i2c_dev->adap.timeout); ret = f7_msg->result; if (ret) { + if (i2c_dev->use_dma) + dmaengine_synchronize(dma->chan_using); + /* * It is possible that some unsent data have already been * written into TXDR. To avoid sending old data in a @@ -1774,7 +1780,7 @@ static int stm32f7_i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, if (!timeout) { dev_dbg(dev, "Access to slave 0x%x timed out\n", f7_msg->addr); if (i2c_dev->use_dma) - dmaengine_terminate_all(dma->chan_using); + dmaengine_terminate_sync(dma->chan_using); stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; goto pm_free; -- cgit v1.2.3-59-g8ed1b