linux-kernel - Re: [PATCH v4 6/7] Bluetooth: mediatek: Add protocol support for MediaTek serial devices

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Message-ID: <CAHp75VedHLw52J_ymh3iYf2w=r8d+Kqg=fJZmBGnaCrEbNEPdQ@mail.gmail.com>
Date:   Wed, 27 Jun 2018 20:04:19 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     sean.wang@...iatek.com
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        devicetree <devicetree@...r.kernel.org>,
        linux-bluetooth@...r.kernel.org,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 6/7] Bluetooth: mediatek: Add protocol support for
 MediaTek serial devices

On Wed, Jun 27, 2018 at 7:59 PM, Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
> On Wed, Jun 27, 2018 at 8:43 AM,  <sean.wang@...iatek.com> wrote:
>> From: Sean Wang <sean.wang@...iatek.com>
>>
>
>> +config BT_HCIBTUART_MTK
>> +       tristate "MediaTek HCI UART driver"
>> +       depends on BT_HCIBTUART
>
>> +       default y
>
> Perhaps it's an overkill for users which would like to have less
> amount on stuff in kernel.
>
>
>> +#include <asm/unaligned.h>
>> +#include <linux/atomic.h>
>> +#include <linux/clk.h>
>> +#include <linux/firmware.h>
>> +#include <linux/module.h>
>> +#include <linux/pm_runtime.h>
>> +#include <linux/serdev.h>

Perhaps alphabetically ordered?

+ blank line.

>
>> +#include <net/bluetooth/bluetooth.h>
>> +#include <net/bluetooth/hci_core.h>

>> +       /* Enable the power domain and clock the device requires. */
>> +       pm_runtime_enable(dev);
>> +       err = pm_runtime_get_sync(dev);
>> +       if (err < 0)
>> +               goto err_pm2;

Should be err_pm1 here.
Yes, that's correct.

>> +err_pm1:
>> +       pm_runtime_put_sync(dev);
>> +err_pm2:
>> +       pm_runtime_disable(dev);

>> +#define MTK_WMT_CMD_SIZE       (MTK_WMT_HDR_SIZE + MTK_STP_HDR_SIZE + \
>> +                                MTK_STP_TLR_SIZE + HCI_ACL_HDR_SIZE)

It would look slightly better if you start on new line like
#define FOO \
 (BAR + BAZ)

>> +struct mtk_stp_hdr {
>> +       __u8 prefix;
>> +       __u8 dlen1:4;
>> +       __u8 type:4;

>> +       __u8 dlen2:8;

u8 already 8 bit.

>> +       __u8 cs;
>> +} __packed;

-- 
With Best Regards,
Andy Shevchenko