This patch adds a comprehensive error message in
case that txqueuelen is too small and the isotp
driver encounters ENOBUFS (105), e.g.
"no buffer space available" while it does
enqueue its generated frames.
Signed-off-by: Patrick Menschel <menschel.p@xxxxxxxxx>
---
net/can/isotp.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/net/can/isotp.c b/net/can/isotp.c
index 9f94ad3ca..c50e238b0 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -946,8 +946,17 @@ static int isotp_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
err = can_send(skb, 1);
dev_put(dev);
if (err) {
- pr_notice_once("can-isotp: %s: can_send_ret %d\n",
- __func__, err);
+ if (err == -ENOBUFS) {
+ /* if txqueuelen is not of sufficient length
+ * for this transfer
+ */
+ pr_notice_once("can-isotp: %s: can_send_ret %d : No buffer space available in tx queue\n",
+ __func__, err);
+ } else {
+ /* general error */
+ pr_notice_once("can-isotp: %s: can_send_ret %d\n",
+ __func__, err);
+ }
return err;
}
--
2.17.1
