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Date: Sat, 17 Mar 2012 20:12:59 -0300
From: Gustavo Padovan <gustavo@padovan.org>
To: Andrei Emeltchenko <Andrei.Emeltchenko.news@gmail.com>
Cc: linux-bluetooth@vger.kernel.org
Subject: Re: [RFCv4 11/30] Bluetooth: A2MP: Build and Send msg helpers
Message-ID: <20120317231259.GB12975@joana>
References: <1331814621-13905-1-git-send-email-Andrei.Emeltchenko.news@gmail.com>
 <1331814621-13905-12-git-send-email-Andrei.Emeltchenko.news@gmail.com>
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Hi Andrei,

* Andrei Emeltchenko <Andrei.Emeltchenko.news@gmail.com> [2012-03-15 14:30:02 +0200]:

> From: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
> 
> Helper function to build and send A2MP messages.
> 
> Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
> ---
>  include/net/bluetooth/a2mp.h |    7 ++++++
>  net/bluetooth/a2mp.c         |   49 ++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 56 insertions(+), 0 deletions(-)
> 
> diff --git a/include/net/bluetooth/a2mp.h b/include/net/bluetooth/a2mp.h
> index 0fe8ddd..995f1c0 100644
> --- a/include/net/bluetooth/a2mp.h
> +++ b/include/net/bluetooth/a2mp.h
> @@ -24,6 +24,13 @@ struct amp_mgr {
>  	unsigned long		flags;
>  };
>  
> +struct a2mp_cmd {
> +	__u8	code;
> +	__u8	ident;
> +	__le16	len;
> +	__u8	data[0];
> +} __packed;
> +
>  void amp_mgr_get(struct amp_mgr *mgr);
>  int amp_mgr_put(struct amp_mgr *mgr);
>  
> diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
> index 63970b5..19a8ac3 100644
> --- a/net/bluetooth/a2mp.c
> +++ b/net/bluetooth/a2mp.c
> @@ -16,6 +16,54 @@
>  #include <net/bluetooth/l2cap.h>
>  #include <net/bluetooth/a2mp.h>
>  
> +/* A2MP build & send command helper functions */
> +static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
> +{
> +	struct a2mp_cmd *cmd;
> +	int plen;
> +
> +	plen = sizeof(*cmd) + len;
> +	cmd = kzalloc(plen, GFP_KERNEL);
> +	if (!cmd)
> +		return NULL;
> +
> +	cmd->code = code;
> +	cmd->ident = ident;
> +	cmd->len = cpu_to_le16(len);
> +
> +	memcpy(cmd->data, data, len);
> +
> +	return cmd;
> +}
> +
> +static inline int __a2mp_send(struct amp_mgr *mgr, u8 *data, int len)
> +{
> +	struct l2cap_chan *chan = mgr->a2mp_chan;
> +	struct kvec iv = { data, len };
> +	struct msghdr msg;
> +
> +	memset(&msg, 0, sizeof(msg));
> +
> +	msg.msg_iov = (struct iovec *) &iv;
> +	msg.msg_iovlen = 1;
> +
> +	return chan->ops->send(chan, &msg, len, 0);

Why do you need this? Just call l2cap_chan_send() directly here.

	Gustavo