Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933626AbXJRRuy (ORCPT ); Thu, 18 Oct 2007 13:50:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762866AbXJRRul (ORCPT ); Thu, 18 Oct 2007 13:50:41 -0400 Received: from ns2.suse.de ([195.135.220.15]:59915 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759775AbXJRRuj (ORCPT ); Thu, 18 Oct 2007 13:50:39 -0400 Date: Thu, 18 Oct 2007 19:50:37 +0200 From: Karsten Keil To: Linus Torvalds Cc: Andrew Morton , linux-kernel@vger.kernel.org, isdn4linux@listserv.isdn4linux.de Subject: [PATCH] [ISDN]Fix random hard freeze with AVM cards using b1dma Message-ID: <20071018175037.GB12773@pingi.kke.suse.de> Mail-Followup-To: Linus Torvalds , Andrew Morton , linux-kernel@vger.kernel.org, isdn4linux@listserv.isdn4linux.de Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Organization: SuSE Linux AG X-Operating-System: Linux 2.6.16.53-0.16-smp x86_64 User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3275 Lines: 105 This fix the hard freeze debuged for AVM C4 cards using the b1dma interface. Signed-off-by: Karsten Keil --- 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) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/