diff options
| author | Cong Wang <amwang@redhat.com> | 2013-01-27 21:14:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-14 10:48:17 -0800 |
| commit | badaed3effae5565307a25a3692ebde36e25fa33 (patch) | |
| tree | 08849f197aec7f220ebf081185e622608d58ba4f | |
| parent | 70b40e0ec5a61b7c073690c2a2fc1da13b520254 (diff) | |
pktgen: correctly handle failures when adding a device
[ Upstream commit 604dfd6efc9b79bce432f2394791708d8e8f6efc ]
The return value of pktgen_add_device() is not checked, so
even if we fail to add some device, for example, non-exist one,
we still see "OK:...". This patch fixes it.
After this patch, I got:
# echo "add_device non-exist" > /proc/net/pktgen/kpktgend_0
-bash: echo: write error: No such device
# cat /proc/net/pktgen/kpktgend_0
Running:
Stopped:
Result: ERROR: can not add device non-exist
# echo "add_device eth0" > /proc/net/pktgen/kpktgend_0
# cat /proc/net/pktgen/kpktgend_0
Running:
Stopped: eth0
Result: OK: add_device=eth0
(Candidate for -stable)
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/core/pktgen.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c index d1dc14c2aac..21350dbe82b 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -1795,10 +1795,13 @@ static ssize_t pktgen_thread_write(struct file *file, return -EFAULT; i += len; mutex_lock(&pktgen_thread_lock); - pktgen_add_device(t, f); + ret = pktgen_add_device(t, f); mutex_unlock(&pktgen_thread_lock); - ret = count; - sprintf(pg_result, "OK: add_device=%s", f); + if (!ret) { + ret = count; + sprintf(pg_result, "OK: add_device=%s", f); + } else + sprintf(pg_result, "ERROR: can not add device %s", f); goto out; } |