From: taolan <taolan@xxxxxxxxxx>
The transfer result is checked, classified, and printed, which
facilitates debugging.
---
drivers/i2c/busses/i2c-hix5hd2.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-hix5hd2.c b/drivers/i2c/busses/i2c-hix5hd2.c
index 61ae58f57047..e6ab8b20cd01 100644
--- a/drivers/i2c/busses/i2c-hix5hd2.c
+++ b/drivers/i2c/busses/i2c-hix5hd2.c
@@ -366,8 +366,17 @@ static int hix5hd2_i2c_xfer(struct i2c_adapter *adap,
goto out;
}
- ret = num;
+ if (i == num) {
+ ret = num;
+ } else {
+ /* Only one message, cannot access the device */
+ if (i == 1)
+ ret = -EREMOTEIO;
+ else
+ ret = i;
+ pr_warning("xfer message failed\n");
+ }
out:
pm_runtime_mark_last_busy(priv->dev);
pm_runtime_put_autosuspend(priv->dev);
--
2.22.0
