Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753677Ab0F0Hbv (ORCPT ); Sun, 27 Jun 2010 03:31:51 -0400 Received: from mail-vw0-f46.google.com ([209.85.212.46]:54191 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752181Ab0F0Hbu (ORCPT ); Sun, 27 Jun 2010 03:31:50 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=CJLjOTsTEN8xRFdKok8LoI0jWnD8MAbzbd1+r1LdV8R1Z2mGZ1NmjiJ0WD3W8mTUAO 1QF6kOHhz/LgiCXglsBQD3JSWlviCNPtdiaB5y4kxsFhdWHaCV3UzBpZ8bDM7Rdk5+ip VN0xSjyy7QZNWr8cuOPtgHt+Bgg8CaMQq3Z8s= Date: Sun, 27 Jun 2010 04:31:40 -0300 From: "Gustavo F. Padovan" To: "Justin P. Mattock" Cc: linux-kernel@vger.kernel.org, dhowells@redhat.com, sds@tycho.nsa.gov, lenb@kernel.org, linux-bluetooth@vger.kernel.org Subject: Re: [PATCH 5/5]bluetooth:hci_bcsp Fix operation on 'bcsp->msgq_txseq' may be undefined Message-ID: <20100627073140.GA32575@vigoh> References: <1277621246-10960-1-git-send-email-justinmattock@gmail.com> <1277621246-10960-6-git-send-email-justinmattock@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1277621246-10960-6-git-send-email-justinmattock@gmail.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1987 Lines: 56 Hi Justin, * Justin P. Mattock [2010-06-26 23:47:26 -0700]: > Im seeing this building the kernel with gcc 4.6.0 > CC [M] drivers/bluetooth/hci_bcsp.o > drivers/bluetooth/hci_bcsp.c: In function 'bcsp_prepare_pkt': > drivers/bluetooth/hci_bcsp.c:247:20: warning: operation on 'bcsp->msgq_txseq' may be undefined > > Hopefully the below is a fix for this. Please let me know. > Signed-off-by: Justin P. Mattock > > --- > drivers/bluetooth/hci_bcsp.c | 6 +++--- > 1 files changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c > index 40aec0f..0f892e7 100644 > --- a/drivers/bluetooth/hci_bcsp.c > +++ b/drivers/bluetooth/hci_bcsp.c > @@ -182,7 +182,7 @@ static struct sk_buff *bcsp_prepare_pkt(struct bcsp_struct *bcsp, u8 *data, > struct sk_buff *nskb; > u8 hdr[4], chan; > u16 BCSP_CRC_INIT(bcsp_txmsg_crc); > - int rel, i; > + int rel, i, ret; > > switch (pkt_type) { > case HCI_ACLDATA_PKT: > @@ -243,8 +243,8 @@ static struct sk_buff *bcsp_prepare_pkt(struct bcsp_struct *bcsp, u8 *data, > > if (rel) { > hdr[0] |= 0x80 + bcsp->msgq_txseq; > - BT_DBG("Sending packet with seqno %u", bcsp->msgq_txseq); > - bcsp->msgq_txseq = ++(bcsp->msgq_txseq) & 0x07; > + BT_DBG("Sending packet with seqno %u", bcsp->msgq_txseq | ret); > + ret = ++(bcsp->msgq_txseq) & 0x07; > } What are trying to do here? That is completely wrong, you are losting the next txseq to be sent. And please do not bother the linux-bluetooth mailing list with patches to other subsystems. Send them in a way that only Bluetooth patches will come to linux-bluetooth. Regards, -- Gustavo F. Padovan http://padovan.org -- 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/