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From: Gustavo F. Padovan on 28 Jun 2010 09:20
Hi David,

* David Howells <dhowells(a)redhat.com> [2010-06-28 13:57:52 +0100]:

> Fix abuse of the preincrement operator as detected when building 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
>
> Reported-by: Justin P. Mattock <justinmattock(a)gmail.com>
> Signed-off-by: David Howells <dhowells(a)redhat.com>
> ---
>
> drivers/bluetooth/hci_bcsp.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
> index 40aec0f..42d69d4 100644
> --- a/drivers/bluetooth/hci_bcsp.c
> +++ b/drivers/bluetooth/hci_bcsp.c
> @@ -244,7 +244,7 @@ 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;
> + bcsp->msgq_txseq = (bcsp->msgq_txseq + 1) & 0x07;
> }
>
> if (bcsp->use_crc)
>

Acked-by: Gustavo F. Padovan <padovan(a)profusion.mobi>

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Gustavo F. Padovan
http://padovan.org
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From: Justin P. Mattock on 28 Jun 2010 14:20
On 06/28/2010 05:57 AM, David Howells wrote:
> Fix abuse of the preincrement operator as detected when building 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
>
> Reported-by: Justin P. Mattock<justinmattock(a)gmail.com>
> Signed-off-by: David Howells<dhowells(a)redhat.com>
> ---
>
> drivers/bluetooth/hci_bcsp.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c
> index 40aec0f..42d69d4 100644
> --- a/drivers/bluetooth/hci_bcsp.c
> +++ b/drivers/bluetooth/hci_bcsp.c
> @@ -244,7 +244,7 @@ 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;
> + bcsp->msgq_txseq = (bcsp->msgq_txseq + 1)& 0x07;
> }
>
> if (bcsp->use_crc)
>
>

ahh.. so it's o.k. to add the value after bcsp->msgq_txseq instead of
before. Anyways build clean over here..

Thanks!

Justin P. Mattock
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From: David Miller on 30 Jun 2010 16:20
From: "Gustavo F. Padovan" <gustavo(a)padovan.org>
Date: Mon, 28 Jun 2010 10:12:30 -0300

> Hi David,
>
> * David Howells <dhowells(a)redhat.com> [2010-06-28 13:57:52 +0100]:
>
>> Fix abuse of the preincrement operator as detected when building 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
>>
>> Reported-by: Justin P. Mattock <justinmattock(a)gmail.com>
>> Signed-off-by: David Howells <dhowells(a)redhat.com>
....
> Acked-by: Gustavo F. Padovan <padovan(a)profusion.mobi>

Applied, thanks everyone.
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