This fix the hard freeze debuged for AVM C4 cards using
the b1dma interface.
Signed-off-by: Karsten Keil <[email protected]>
---
drivers/isdn/hardware/avm/b1dma.c | 28 +++++++++++++++++++---------
1 files changed, 19 insertions(+), 9 deletions(-)
diff --git a/drivers/isdn/hardware/avm/b1dma.c b/drivers/isdn/hardware/avm/b1dma.c
index 428872b..a40997b 100644
--- a/drivers/isdn/hardware/avm/b1dma.c
+++ b/drivers/isdn/hardware/avm/b1dma.c
@@ -486,11 +486,13 @@ static void b1dma_handle_rx(avmcard *card)
card->name);
} else {
memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
- if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_CONF)
+ if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_CONF) {
+ spin_lock(&card->lock);
capilib_data_b3_conf(&cinfo->ncci_head, ApplId,
- CAPIMSG_NCCI(skb->data),
- CAPIMSG_MSGID(skb->data));
-
+ CAPIMSG_NCCI(skb->data),
+ CAPIMSG_MSGID(skb->data));
+ spin_unlock(&card->lock);
+ }
capi_ctr_handle_message(ctrl, ApplId, skb);
}
break;
@@ -500,9 +502,9 @@ static void b1dma_handle_rx(avmcard *card)
ApplId = _get_word(&p);
NCCI = _get_word(&p);
WindowSize = _get_word(&p);
-
+ spin_lock(&card->lock);
capilib_new_ncci(&cinfo->ncci_head, ApplId, NCCI, WindowSize);
-
+ spin_unlock(&card->lock);
break;
case RECEIVE_FREE_NCCI:
@@ -510,9 +512,11 @@ static void b1dma_handle_rx(avmcard *card)
ApplId = _get_word(&p);
NCCI = _get_word(&p);
- if (NCCI != 0xffffffff)
+ if (NCCI != 0xffffffff) {
+ spin_lock(&card->lock);
capilib_free_ncci(&cinfo->ncci_head, ApplId, NCCI);
-
+ spin_unlock(&card->lock);
+ }
break;
case RECEIVE_START:
@@ -751,10 +755,10 @@ void b1dma_reset_ctr(struct capi_ctr *ctrl)
spin_lock_irqsave(&card->lock, flags);
b1dma_reset(card);
- spin_unlock_irqrestore(&card->lock, flags);
memset(cinfo->version, 0, sizeof(cinfo->version));
capilib_release(&cinfo->ncci_head);
+ spin_unlock_irqrestore(&card->lock, flags);
capi_ctr_reseted(ctrl);
}
@@ -803,8 +807,11 @@ void b1dma_release_appl(struct capi_ctr *ctrl, u16 appl)
avmcard *card = cinfo->card;
struct sk_buff *skb;
void *p;
+ unsigned long flags;
+ spin_lock_irqsave(&card->lock, flags);
capilib_release_appl(&cinfo->ncci_head, appl);
+ spin_unlock_irqrestore(&card->lock, flags);
skb = alloc_skb(7, GFP_ATOMIC);
if (!skb) {
@@ -832,10 +839,13 @@ u16 b1dma_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
u16 retval = CAPI_NOERROR;
if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3_REQ) {
+ unsigned long flags;
+ spin_lock_irqsave(&card->lock, flags);
retval = capilib_data_b3_req(&cinfo->ncci_head,
CAPIMSG_APPID(skb->data),
CAPIMSG_NCCI(skb->data),
CAPIMSG_MSGID(skb->data));
+ spin_unlock_irqrestore(&card->lock, flags);
}
if (retval == CAPI_NOERROR)
b1dma_queue_tx(card, skb);
--
Karsten Keil
SuSE Labs
ISDN and VOIP development
SUSE LINUX Products GmbH, Maxfeldstr.5 90409 Nuernberg, GF: Markus Rex, HRB 16746 (AG Nuernberg)
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