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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2006-12-06 20:36:59 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:34 -0800
commitf89d75f224dc530f1c173d9093f75865345840a1 (patch)
treeebcc6269556dda7e70c29d1cccfa2e5b2925e57d
parent9774a1f54f173ad18e816496c8979f1bf8ef666a (diff)
downloadlinux-f89d75f224dc530f1c173d9093f75865345840a1.tar.bz2
[PATCH] lockdep: annotate bcsp driver
============================================= [ INFO: possible recursive locking detected ] 2.6.18-1.2699.fc6 #1 --------------------------------------------- swapper/0 is trying to acquire lock: (&list->lock#3){+...}, at: [<c05ad307>] skb_dequeue+0x12/0x43 but task is already holding lock: (&list->lock#3){+...}, at: [<df98cd79>] bcsp_dequeue+0x6a/0x11e [hci_uart] Two different list locks nest, annotate so. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Marcel Holtmann <marcel@holtmann.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/bluetooth/hci_bcsp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
index d0cface535fb..5e2c31882003 100644
--- a/drivers/bluetooth/hci_bcsp.c
+++ b/drivers/bluetooth/hci_bcsp.c
@@ -330,7 +330,7 @@ static struct sk_buff *bcsp_dequeue(struct hci_uart *hu)
reliable packet if the number of packets sent but not yet ack'ed
is < than the winsize */
- spin_lock_irqsave(&bcsp->unack.lock, flags);
+ spin_lock_irqsave_nested(&bcsp->unack.lock, flags, SINGLE_DEPTH_NESTING);
if (bcsp->unack.qlen < BCSP_TXWINSIZE && (skb = skb_dequeue(&bcsp->rel)) != NULL) {
struct sk_buff *nskb = bcsp_prepare_pkt(bcsp, skb->data, skb->len, bt_cb(skb)->pkt_type);
@@ -696,7 +696,7 @@ static void bcsp_timed_event(unsigned long arg)
BT_DBG("hu %p retransmitting %u pkts", hu, bcsp->unack.qlen);
- spin_lock_irqsave(&bcsp->unack.lock, flags);
+ spin_lock_irqsave_nested(&bcsp->unack.lock, flags, SINGLE_DEPTH_NESTING);
while ((skb = __skb_dequeue_tail(&bcsp->unack)) != NULL) {
bcsp->msgq_txseq = (bcsp->msgq_txseq - 1) & 0x07;