netdev - Re: [PATCH] wifi: brcmfmac: Fix error return code in brcmf_sdio_download

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Date:   Thu, 01 Dec 2022 13:16:17 +0200
From:   Kalle Valo <kvalo@...nel.org>
To:     Arend Van Spriel <arend.vanspriel@...adcom.com>
Cc:     wangyufen <wangyufen@...wei.com>,
        Franky Lin <franky.lin@...adcom.com>, <aspriel@...il.com>,
        <hante.meuleman@...adcom.com>, <davem@...emloft.net>,
        <linux-wireless@...r.kernel.org>,
        <brcm80211-dev-list.pdl@...adcom.com>,
        <SHA-cyfmac-dev-list@...ineon.com>, <netdev@...r.kernel.org>,
        <arend@...adcom.com>
Subject: Re: [PATCH] wifi: brcmfmac: Fix error return code in brcmf_sdio_download_firmware()

Arend Van Spriel <arend.vanspriel@...adcom.com> writes:

> On December 1, 2022 4:01:39 AM wangyufen <wangyufen@...wei.com> wrote:
>
>> 在 2022/11/30 19:19, Arend van Spriel 写道:
>>> On 11/30/2022 3:00 AM, wangyufen wrote:
>>>>
>>>>
>>>> 在 2022/11/30 1:41, Franky Lin 写道:
>>>>> On Tue, Nov 29, 2022 at 1:47 AM Wang Yufen <wangyufen@...wei.com> wrote:
>>>>>>
>>>>>> Fix to return a negative error code -EINVAL instead of 0.
>>>>>>
>>>>>> Compile tested only.
>>>>>>
>>>>>> Fixes: d380ebc9b6fb ("brcmfmac: rename chip download functions")
>>>>>> Signed-off-by: Wang Yufen <wangyufen@...wei.com>
>>>>>> ---
>>>>>>  drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 1 +
>>>>>>  1 file changed, 1 insertion(+)
>>>>>>
>>>>>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>>>> b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>>>> index 465d95d..329ec8ac 100644
>>>>>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>>>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
>>>>>> @@ -3414,6 +3414,7 @@ static int brcmf_sdio_download_firmware(struct
>>>>>> brcmf_sdio *bus,
>>>>>>         /* Take arm out of reset */
>>>>>>         if (!brcmf_chip_set_active(bus->ci, rstvec)) {
>>>>>>                 brcmf_err("error getting out of ARM core reset\n");
>>>>>> +               bcmerror = -EINVAL;
>>>>>
>>>>> ENODEV seems more appropriate here.
>>>>
>>>> However, if brcmf_chip_set_active()  fails in
>>>> brcmf_pcie_exit_download_state(), "-EINVAL" is returned.
>>>> Is it necessary to keep consistent?
>>>
>>> If we can not get the ARM on the chip out of reset things will fail soon
>>> enough further down the road. Anyway, the other function calls return
>>> -EIO so let's do the same here.
>>
>> So -EIO is better?  Anyone else have any other opinions? 😄
>
> Obviously it is no better than -EINVAL when you look at the behavior.
> It is just a feeble attempt to be a little bit more consistent. Feel
> free to change the return value for brcmf_pcie_exit_download_state()
> as well.

Weirdly Arend's last comment is not visible in patchwork:

https://patchwork.kernel.org/project/linux-wireless/patch/1669716458-15327-1-git-send-email-wangyufen@huawei.com/

His last email is visible, but the last paragraph is not shown. Some
strange hiccup somewhere I guess, just wanted to mention it in case we
see more of them.

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