Commit 7c7d90f2 authored by Eric Van Hensbergen's avatar Eric Van Hensbergen

9p: Fix soft lockup in virtio transport

This fixes a poorly placed spinlock which could result in a
soft lockup condition.
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent c55703d8
......@@ -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);
spin_lock_irqsave(&chan->lock, flags);
n = P9_NOTAG;
if (tc->id != P9_TVERSION) {
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;
}
spin_lock_irqsave(&chan->lock, flags);
req = p9_lookup_tag(chan, n);
spin_unlock_irqrestore(&chan->lock, flags);
......
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