From: Alain Volmat alain.volmat@foss.st.com
commit b933d1faf8fa30d16171bcff404e39c41b2a7c84 upstream.
When getting an access timeout, ensure that the bus is in a proper state prior to returning the error.
Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver") Signed-off-by: Alain Volmat alain.volmat@foss.st.com Reviewed-by: Pierre-Yves MORDRET pierre-yves.mordret@foss.st.com Signed-off-by: Wolfram Sang wsa@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/i2c/busses/i2c-stm32f7.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -1602,6 +1602,7 @@ static int stm32f7_i2c_xfer(struct i2c_a i2c_dev->msg->addr); if (i2c_dev->use_dma) dmaengine_terminate_all(dma->chan_using); + stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; }
@@ -1659,6 +1660,7 @@ static int stm32f7_i2c_smbus_xfer(struct 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); + stm32f7_i2c_wait_free_bus(i2c_dev); ret = -ETIMEDOUT; goto pm_free; }