GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[NETPOLL]: Revert two bogus cleanups that broke netconsole.

Browse source 
Based upon a report by Andrew Morton and code analysis done
by Jarek Poplawski.

This reverts 33f807ba0d ("[NETPOLL]:
Kill NETPOLL_RX_DROP, set but never tested.")  and
c7b6ea24b4 ("[NETPOLL]: Don't need
rx_flags.").

The rx_flags did get tested for zero vs. non-zero and therefore we do
need those tests and that code which sets NETPOLL_RX_DROP et al.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-03-04 12:28:49 -08:00
parent ec9b6add7d
commit d9452e9f81
2 changed files with 12 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

7
include/linux/netpoll.h
View file

@ -25,6 +25,7 @@ struct netpoll {
struct netpoll_info {
atomic_t refcnt;
int rx_flags;
spinlock_t rx_lock;
struct netpoll *rx_np; /* netpoll that registered an rx_hook */
struct sk_buff_head arp_tx; /* list of arp requests to reply to */
@ -50,12 +51,12 @@ static inline int netpoll_rx(struct sk_buff *skb)
unsigned long flags;
int ret = 0;
if (!npinfo || !npinfo->rx_np)
if (!npinfo || (!npinfo->rx_np && !npinfo->rx_flags))
return 0;
spin_lock_irqsave(&npinfo->rx_lock, flags);
/* check rx_np again with the lock held */
if (npinfo->rx_np && __netpoll_rx(skb))
/* check rx_flags again with the lock held */
if (npinfo->rx_flags && __netpoll_rx(skb))
ret = 1;
spin_unlock_irqrestore(&npinfo->rx_lock, flags);