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[RESEND,1/3] i2c: at91: move i2c_recover_bus() outside of at91_do_twi_transfer()

Message ID 20220614101347.16910-2-codrin.ciubotariu@microchip.com
State New
Headers show
Series i2c: at91: Fixes and updates | expand

Commit Message

Codrin Ciubotariu June 14, 2022, 10:13 a.m. UTC 
This patch doesn't add a functional change, it just separates the recovery
from the transfer itself.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
---

Removed 'Fixes' tag

 drivers/i2c/busses/i2c-at91-master.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/drivers/i2c/busses/i2c-at91-master.c b/drivers/i2c/busses/i2c-at91-master.c
index c0c35785a0dc..34df1614bc37 100644
--- a/drivers/i2c/busses/i2c-at91-master.c
+++ b/drivers/i2c/busses/i2c-at91-master.c
@@ -639,13 +639,6 @@  static int at91_do_twi_transfer(struct at91_twi_dev *dev)
 			       AT91_TWI_THRCLR | AT91_TWI_LOCKCLR);
 	}
 
-	/*
-	 * some faulty I2C slave devices might hold SDA down;
-	 * we can send a bus clear command, hoping that the pins will be
-	 * released
-	 */
-	i2c_recover_bus(&dev->adapter);
-
 	return ret;
 }
 
@@ -716,7 +709,17 @@  static int at91_twi_xfer(struct i2c_adapter *adap, struct i2c_msg *msg, int num)
 	ret = at91_do_twi_transfer(dev);
 	i2c_put_dma_safe_msg_buf(dma_buf, m_start, !ret);
 
-	ret = (ret < 0) ? ret : num;
+	if (ret < 0) {
+		/*
+		 * some faulty I2C slave devices might hold SDA down;
+		 * we can send a bus clear command, hoping that the pins will be
+		 * released
+		 */
+		i2c_recover_bus(&dev->adapter);
+	} else {
+		ret = num;
+	}
+
 out:
 	pm_runtime_mark_last_busy(dev->dev);
 	pm_runtime_put_autosuspend(dev->dev);