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return kernel-supplied error if available.

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Also fix field names in a comment.
This commit is contained in:
Luigi Rizzo 2014-11-10 08:31:56 +00:00
parent 8bcd603968
commit 0506889c15
1 changed files with 3 additions and 2 deletions
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3
sys/net/netmap_user.h
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@ -40,7 +40,7 @@
* From there:
* struct netmap_ring *NETMAP_TXRING(nifp, index)
* struct netmap_ring *NETMAP_RXRING(nifp, index)
* we can access ring->nr_cur, ring->nr_avail, ring->nr_flags
* we can access ring->cur, ring->head, ring->tail, etc.
*
* ring->slot[i] gives us the i-th slot (we can access
* directly len, flags, buf_idx)
@ -543,6 +543,7 @@ nm_open(const char *ifname, const struct nmreq *req,
nm_close(d);
if (errmsg)
D("%s %s", errmsg, ifname);
if (errno == 0)
errno = EINVAL;
return NULL;
}