| Message ID | 1632151292-18503-5-git-send-email-alain.volmat@foss.st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | i2c: stm32: various fixes & dmaengine updates | expand |
Hi Alain Look good to me Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@foss.st.com> Regards On 9/20/21 5:21 PM, Alain Volmat wrote: > 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 <alain.volmat@foss.st.com> > --- > 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; >
On Mon, Sep 20, 2021 at 05:21:32PM +0200, Alain Volmat wrote: > 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 <alain.volmat@foss.st.com> Applied to for-current, thanks!
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;
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 <alain.volmat@foss.st.com> --- drivers/i2c/busses/i2c-stm32f7.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)