diff mbox series

[7/7] i2c: stm32f7: : use proper DMAENGINE API for termination

Message ID 20210623095942.3325-8-wsa+renesas@sang-engineering.com
State New
Headers show
Series i2c: use proper DMAENGINE API for termination | expand

Commit Message

Wolfram Sang June 23, 2021, 9:59 a.m. UTC 
dmaengine_terminate_all() is deprecated in favor of explicitly saying if
it should be sync or async. Here, we want dmaengine_terminate_sync()
because there is no other synchronization code in the driver to handle
an async case.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/i2c/busses/i2c-stm32f7.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Comments

Alain Volmat June 30, 2021, 1:11 p.m. UTC | #1 
Hi Wolfram,

thanks for the update. If you are ok with that I modify the patch
to partially rely on _async / synchronize whenever needed and push it again
separately.

Regards,
Alain

On Wed, Jun 23, 2021 at 04:03:57PM +0200, Wolfram Sang wrote:
> On Wed, Jun 23, 2021 at 11:59:41AM +0200, Wolfram Sang wrote:
> > dmaengine_terminate_all() is deprecated in favor of explicitly saying if
> > it should be sync or async. Here, we want dmaengine_terminate_sync()
> > because there is no other synchronization code in the driver to handle
> > an async case.
> > 
> > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> Eeks, this is called from irq context as well. Broken patch :(
>
diff mbox series

Patch

diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 0138317ea600..9ea074a7ced6 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -1567,7 +1567,7 @@  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_sync(dma->chan_using);
 		f7_msg->result = -ETIMEDOUT;
 	}
 
@@ -1637,7 +1637,7 @@  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_sync(dma->chan_using);
 	}
 
 	i2c_dev->master_mode = false;
@@ -1678,7 +1678,7 @@  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);
 		ret = -ETIMEDOUT;
 	}
 
@@ -1727,7 +1727,7 @@  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);
 		ret = -ETIMEDOUT;
 		goto pm_free;
 	}