Re: [PATCH 1/9] HSI: cmt_speech: Add cmt-speech driver
From: Oliver Neukum
Date: Mon Mar 02 2015 - 05:29:39 EST
On Mon, 2015-03-02 at 05:38 +0100, Sebastian Reichel wrote:
> +static int cs_alloc_cmds(struct cs_hsi_iface *hi)
> +{
> + struct hsi_msg *msg;
> + u32 *buf;
> + unsigned int i;
> +
> + INIT_LIST_HEAD(&hi->cmdqueue);
> +
> + for (i = 0; i < CS_MAX_CMDS; i++) {
> + msg = hsi_alloc_msg(1, GFP_ATOMIC);
Why does this need to be ATOMIC?
> + if (!msg)
> + goto out;
> + buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
> + if (!buf) {
> + hsi_free_msg(msg);
> + goto out;
> + }
> + sg_init_one(msg->sgt.sgl, buf, sizeof(*buf));
> + msg->channel = CONTROL_HSI_CH;
> + msg->context = hi;
> + list_add_tail(&msg->link, &hi->cmdqueue);
> + }
> +
> + return 0;
> +
> +out:
> + cs_free_cmds(hi);
> + return -ENOMEM;
> +}
> +
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