Before the re-implementation of serdev_device_write_buf() to use
serdev_device_write() internally, this function returned the number of bytes
written in case of success. serdev_device_write() instead returns 0 when
the transmission was successful, which breaks users relying on the old API.
Fixes: 6fe729c4bdae (serdev: Add serdev_device_write subroutine)
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
---
include/linux/serdev.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index cda76c6506ca..4ced8f177220 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -316,7 +316,10 @@ static inline int serdev_device_write_buf(struct serdev_device *serdev,
const unsigned char *data,
size_t count)
{
- return serdev_device_write(serdev, data, count, 0);
+ int ret;
+
+ ret = serdev_device_write(serdev, data, count, 0);
+ return ret ? ret : count;
}
#endif /*_LINUX_SERDEV_H */
--
2.11.0
--
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