i2c-eg20t : Fix the issue of Combined R/W transfer mode

issue-1
In case combined transfer mode fails halfway, the processing must be stopped halfway.
However currently, the processing is continued.
This patch breaks the processing.

issue-2
Currently, pch_i2c_xfer returns read/write size at that time.
However pch_i2c_xfer must return the number of messages to be read/written.
This patch modifies correctly.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 9b072fd42108..ce1a32b71e47 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -673,7 +673,7 @@ static s32 pch_i2c_xfer(struct i2c_adapter *i2c_adap,
         /* transfer not completed */
         adap->pch_i2c_xfer_in_progress = true;
 
-        for (i = 0; i < num; i++) {
+        for (i = 0; i < num && ret >= 0; i++) {
                 pmsg = &msgs[i];
                 pmsg->flags |= adap->pch_buff_mode_en;
                 status = pmsg->flags;
@@ -699,7 +699,7 @@ static s32 pch_i2c_xfer(struct i2c_adapter *i2c_adap,
 
         mutex_unlock(&pch_mutex);
 
-        return ret;
+        return (ret < 0) ? ret : num;
 }
 
 /**