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| author | Karsten Keil <kkeil@suse.de> | 2007-10-18 23:39:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-19 11:53:34 -0700 |
| commit | 1e9c7813723c925623f2e21a93e2d5dc05ea8d12 (patch) | |
| tree | 85d8652887aba6b32772bf2408dedbe10667e2cf /drivers/isdn | |
| parent | eac141deb4f0136059372923ac3f0eab0bef5bce (diff) | |
| download | linux-1e9c7813723c925623f2e21a93e2d5dc05ea8d12.tar.gz linux-1e9c7813723c925623f2e21a93e2d5dc05ea8d12.tar.bz2 linux-1e9c7813723c925623f2e21a93e2d5dc05ea8d12.zip | |
isdn: fix random hard freeze with AVM cards using b1dma
This fixes the hard freeze debugded for AVM C4 cards using the b1dma
interface.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/isdn')
| -rw-r--r-- | 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 428872b653e9..669f6f67449c 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); |