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9p: Fix soft lockup in virtio transport 

This fixes a poorly placed spinlock which could result in a
soft lockup condition.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Eric Van Hensbergen 2008-02-06 19:25:07 -06:00
parent c55703d807
commit 7c7d90f2dd
1 changed files with 1 additions and 1 deletions
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2
net/9p/trans_virtio.c
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@ -232,7 +232,6 @@ p9_virtio_rpc(struct p9_trans *t, struct p9_fcall *tc, struct p9_fcall **rc,
rdata = (char *)*rc+sizeof(struct p9_fcall); rdata = (char *)*rc+sizeof(struct p9_fcall);
spin_lock_irqsave(&chan->lock, flags);
n = P9_NOTAG; n = P9_NOTAG;
if (tc->id != P9_TVERSION) { if (tc->id != P9_TVERSION) {
n = p9_idpool_get(chan->tagpool); n = p9_idpool_get(chan->tagpool);
@ -240,6 +239,7 @@ p9_virtio_rpc(struct p9_trans *t, struct p9_fcall *tc, struct p9_fcall **rc,
return -ENOMEM; return -ENOMEM;
} }
spin_lock_irqsave(&chan->lock, flags);
req = p9_lookup_tag(chan, n); req = p9_lookup_tag(chan, n);
spin_unlock_irqrestore(&chan->lock, flags); spin_unlock_irqrestore(&chan->lock, flags);