linux-kernel - Re: [PATCHv4] remoteproc: Add STE modem driver for remoteproc

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Date:	Sat, 22 Sep 2012 15:33:23 +0200
From:	Sjur Brændeland <sjurbren@...il.com>
To:	Ohad Ben-Cohen <ohad@...ery.com>
Cc:	linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCHv4] remoteproc: Add STE modem driver for remoteproc

Hi Ohad,

>>> It might be safer though to invoke ->setup() in probe/remove, instead
>>> of in start/stop (just like you essentially did before).
>>>
>>> This way we don't assume that stop is always called before remove (as
>>> assumption that might be implicitly valid today, but may break in the
>>> future).
>>>
>>> If you want, I can just change that before applying.
>>
>> Sounds good, please just go ahead and change this before applying.
>> Thank you.
>
> I'm going to squash the below into the patch - please ack before I
> apply and push - thanks!

Looks good, thanks.

Acked-by: Sjur Brændeland <sjur.brandeland@...ricsson.om>

>
> diff --git a/drivers/remoteproc/ste_modem_rproc.c
> b/drivers/remoteproc/ste_modem_rproc.c
> index fcc8677..a7743c0 100644
> --- a/drivers/remoteproc/ste_modem_rproc.c
> +++ b/drivers/remoteproc/ste_modem_rproc.c
> @@ -190,9 +190,6 @@ static int sproc_start(struct rproc *rproc)
>
>         sproc_dbg(sproc, "start ste-modem\n");
>
> -       /* Provide callback functions to modem device */
> -       sproc->mdev->ops.setup(sproc->mdev, &sproc_dev_cb);
> -
>         /* Sanity test the max_notifyid */
>         if (rproc->max_notifyid > SPROC_MAX_NOTIFY_ID) {
>                 sproc_err(sproc, "Notification IDs too high:%d\n",
> @@ -220,9 +217,6 @@ static int sproc_stop(struct rproc *rproc)
>         struct sproc *sproc = rproc->priv;
>         sproc_dbg(sproc, "stop ste-modem\n");
>
> -       /* Reset device callback functions */
> -       sproc->mdev->ops.setup(sproc->mdev, NULL);
> -
>         return sproc->mdev->ops.power(sproc->mdev, false);
>  }
>
> @@ -241,6 +235,9 @@ static int sproc_drv_remove(struct platform_device *pdev)
>
>         sproc_dbg(sproc, "remove ste-modem\n");
>
> +       /* Reset device callback functions */
> +       sproc->mdev->ops.setup(sproc->mdev, NULL);
> +
>         /* Unregister as remoteproc device */
>         rproc_del(sproc->rproc);
>         rproc_put(sproc->rproc);
> @@ -260,6 +257,13 @@ static int sproc_probe(struct platform_device *pdev)
>         int err;
>
>         dev_dbg(&mdev->pdev.dev, "probe ste-modem\n");
> +
> +       if (!mdev->ops.setup || !mdev->ops.kick || !mdev->ops.kick_subscribe ||
> +           !mdev->ops.power) {
> +               dev_err(&mdev->pdev.dev, "invalid mdev ops\n");
> +               return -EINVAL;
> +       }
> +
>         rproc = rproc_alloc(&mdev->pdev.dev, mdev->pdev.name, &sproc_ops,
>                             SPROC_MODEM_FIRMWARE, sizeof(*sproc));
>         if (!rproc)
> @@ -270,6 +274,9 @@ static int sproc_probe(struct platform_device *pdev)
>         sproc->rproc = rproc;
>         mdev->drv_data = sproc;
>
> +       /* Provide callback functions to modem device */
> +       sproc->mdev->ops.setup(sproc->mdev, &sproc_dev_cb);
> +
>         /* Set the STE-modem specific firmware handler */
>         rproc->fw_ops = &sproc_fw_ops;
--
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