From: Neil Horman <nhor...@redhat.com>
We precheck that we have enough space in an iochannel prior to writing to
it when we send in a fragmented skb. Given that there is no recovery from
this condition that I can see, turn it into a BUG halt
Signed-off-by: Neil Horman <nhor...@redhat.com>
Signed-off-by: Benjamin Romer <benjamin.ro...@unisys.com>
---
drivers/staging/unisys/visornic/visornic_main.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/unisys/visornic/visornic_main.c
b/drivers/staging/unisys/visornic/visornic_main.c
index 1a0efe2..f736392 100644
--- a/drivers/staging/unisys/visornic/visornic_main.c
+++ b/drivers/staging/unisys/visornic/visornic_main.c
@@ -254,8 +254,16 @@ visor_copy_fragsinfo_from_skb(struct sk_buff *skb,
unsigned int firstfraglen,
page_offset,
skb_shinfo(skb)->frags[ii].
size, count, frags_max, frags);
- if (!count)
- return -EIO;
+ /*
+ * add_physinfo_entries only returns
+ * zero if the frags array is out of room
+ * That should never happen because we
+ * fail above, if count+numfrags > frags_max.
+ * Given that theres no recovery mechanism from putting
+ * half a packet in the I/O channel, panic here as this
+ * should never happen
+ */
+ BUG_ON(!count);
}
}
if (skb_shinfo(skb)->frag_list) {
--
2.1.4
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