From f0073d7045f1a88846712bb03928be40e1e39c01 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@osmocom.org>
Date: Sat, 30 Jan 2021 11:41:13 +0100
Subject: ns2: Log ERROR if we cannot transmit a packet due to ENOBUFS

Related: OS#4995
Change-Id: I2ba64e96c60e23d2e6c8ecdcab0b52b3833f092c
---
 src/gb/gprs_ns2_fr.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/gb/gprs_ns2_fr.c b/src/gb/gprs_ns2_fr.c
index f73033b4..096e150a 100644
--- a/src/gb/gprs_ns2_fr.c
+++ b/src/gb/gprs_ns2_fr.c
@@ -247,11 +247,15 @@ static int fr_dlci_rx_cb(void *cb_data, struct msgb *msg)
 
 static int handle_netif_write(struct osmo_fd *ofd, struct msgb *msg)
 {
-	int rc = write(ofd->fd, msgb_data(msg), msgb_length(msg));
+	struct gprs_ns2_vc_bind *bind = ofd->data;
+	int rc;
+
+	rc = write(ofd->fd, msgb_data(msg), msgb_length(msg));
 	/* write_queue expects a "-errno" type return value in case of failure */
-	if (rc == -1)
+	if (rc == -1) {
+		LOGBIND(bind, LOGL_ERROR, "error during write to AF_PACKET: %s\n", strerror(errno));
 		return -errno;
-	else
+	} else
 		return rc;
 }
 
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