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authorCong Wang <amwang@redhat.com>2013-01-27 21:14:08 +0000
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-02-14 10:49:05 -0800
commit6c1128b87d5814de27f8ddc445783a81914b194f (patch)
tree97ea12d58e9aa3013aa9a5e0cf6d6d6d03a5bc80 /net
parente38660420e8e12d7fd6b58069d985b6298aad176 (diff)
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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>
Diffstat (limited to 'net')
-rw-r--r--net/core/pktgen.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 8dae76f481e..114d8a9e857 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -1802,10 +1802,13 @@ 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;
}