fs tftp: Fix short file transfers

With files smaller than the tftp block size the whole transfer is done
in tftp_do_open already. In this case we are in STATE_DONE, but there
is no error. Set priv->err to 0 and check for it to be able to transfer
small files.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/tftp.c b/fs/tftp.c
index e8a209e20f..6586270e35 100644
--- a/fs/tftp.c
+++ b/fs/tftp.c
@@ -336,6 +336,7 @@ static void tftp_handler(void *ctx, char *packet, unsigned len)
 
 		if (len < priv->blocksize) {
 			tftp_send(priv);
+			priv->err = 0;
 			priv->state = STATE_DONE;
 		}
 
@@ -423,7 +424,7 @@ static struct file_priv *tftp_do_open(struct device_d *dev,
 			goto out2;
 	}
 
-	if (priv->state == STATE_DONE) {
+	if (priv->state == STATE_DONE && priv->err) {
 		ret = priv->err;
 		goto out2;
 	}