2018-03-12 12:45:33

by Arend Van Spriel

[permalink] [raw]
Subject: Re: [2/3] mwifiex: support sysfs initiated device coredump

On 3/12/2018 10:41 AM, Kalle Valo wrote:
> Arend Van Spriel <[email protected]> wrote:
>
>> Since commit 3c47d19ff4dc ("drivers: base: add coredump driver ops")
>> it is possible to initiate a device coredump from user-space. This
>> patch adds support for it adding the .coredump() driver callback.
>> As there is no longer a need to initiate it through debugfs remove
>> that code.
>>
>> Signed-off-by: Arend van Spriel <[email protected]>
>
> Based on the discussion I assume this is ok to take to w-d-next. If that's not
> the case, please let me know ASAP.

It is up to the mwifiex maintainers to decide, I guess. The ABI
documentation need to be revised and change the callback to void return
type. I am not sure what the best approach is. 1) apply this and fix
return type later, or 2) fix return type and resubmit this. What is your
opinion?

Regards,
Arend



2018-03-13 13:12:33

by Kalle Valo

[permalink] [raw]
Subject: Re: [2/3] mwifiex: support sysfs initiated device coredump

Arend van Spriel <[email protected]> writes:

> On 3/12/2018 10:41 AM, Kalle Valo wrote:
>> Arend Van Spriel <[email protected]> wrote:
>>
>>> Since commit 3c47d19ff4dc ("drivers: base: add coredump driver ops")
>>> it is possible to initiate a device coredump from user-space. This
>>> patch adds support for it adding the .coredump() driver callback.
>>> As there is no longer a need to initiate it through debugfs remove
>>> that code.
>>>
>>> Signed-off-by: Arend van Spriel <[email protected]>
>>
>> Based on the discussion I assume this is ok to take to w-d-next. If that's not
>> the case, please let me know ASAP.
>
> It is up to the mwifiex maintainers to decide, I guess. The ABI
> documentation need to be revised and change the callback to void
> return type. I am not sure what the best approach is. 1) apply this
> and fix return type later, or 2) fix return type and resubmit this.
> What is your opinion?

I guess the callback change will go through Greg's tree? Then I suspect
it's easier that you submit the callback change to Greg first and wait
for it to trickle down to wireless-drivers-next (after the next merge
window) and then I can apply the driver patches. Otherwise there might
be a conflict between my and Greg's tree.

--
Kalle Valo

2018-03-13 19:43:44

by Arend Van Spriel

[permalink] [raw]
Subject: Re: [2/3] mwifiex: support sysfs initiated device coredump

On 3/13/2018 2:10 PM, Kalle Valo wrote:
> Arend van Spriel <[email protected]> writes:
>
>> On 3/12/2018 10:41 AM, Kalle Valo wrote:
>>> Arend Van Spriel <[email protected]> wrote:
>>>
>>>> Since commit 3c47d19ff4dc ("drivers: base: add coredump driver ops")
>>>> it is possible to initiate a device coredump from user-space. This
>>>> patch adds support for it adding the .coredump() driver callback.
>>>> As there is no longer a need to initiate it through debugfs remove
>>>> that code.
>>>>
>>>> Signed-off-by: Arend van Spriel <[email protected]>
>>>
>>> Based on the discussion I assume this is ok to take to w-d-next. If that's not
>>> the case, please let me know ASAP.
>>
>> It is up to the mwifiex maintainers to decide, I guess. The ABI
>> documentation need to be revised and change the callback to void
>> return type. I am not sure what the best approach is. 1) apply this
>> and fix return type later, or 2) fix return type and resubmit this.
>> What is your opinion?
>
> I guess the callback change will go through Greg's tree? Then I suspect
> it's easier that you submit the callback change to Greg first and wait
> for it to trickle down to wireless-drivers-next (after the next merge
> window) and then I can apply the driver patches. Otherwise there might
> be a conflict between my and Greg's tree.

That was my assessment, but unfortunately Marcel already applied the
btmrvl patch before I could reply. So how do I move from here? Option 1)
revert brmrvl and fix callback return type, or 2) apply mwifiex patch
and fix callback return type later for both drivers.

Regards,
Arend


2018-03-13 20:20:32

by Marcel Holtmann

[permalink] [raw]
Subject: Re: [2/3] mwifiex: support sysfs initiated device coredump

Hi Arend,

>>>>> Since commit 3c47d19ff4dc ("drivers: base: add coredump driver ops")
>>>>> it is possible to initiate a device coredump from user-space. This
>>>>> patch adds support for it adding the .coredump() driver callback.
>>>>> As there is no longer a need to initiate it through debugfs remove
>>>>> that code.
>>>>>
>>>>> Signed-off-by: Arend van Spriel <[email protected]>
>>>>
>>>> Based on the discussion I assume this is ok to take to w-d-next. If that's not
>>>> the case, please let me know ASAP.
>>>
>>> It is up to the mwifiex maintainers to decide, I guess. The ABI
>>> documentation need to be revised and change the callback to void
>>> return type. I am not sure what the best approach is. 1) apply this
>>> and fix return type later, or 2) fix return type and resubmit this.
>>> What is your opinion?
>>
>> I guess the callback change will go through Greg's tree? Then I suspect
>> it's easier that you submit the callback change to Greg first and wait
>> for it to trickle down to wireless-drivers-next (after the next merge
>> window) and then I can apply the driver patches. Otherwise there might
>> be a conflict between my and Greg's tree.
>
> That was my assessment, but unfortunately Marcel already applied the btmrvl patch before I could reply. So how do I move from here? Option 1) revert brmrvl and fix callback return type, or 2) apply mwifiex patch and fix callback return type later for both drivers.

I can take the patch back out of bluetooth-next if needed. It is your call.

Regards

Marcel


2018-03-13 20:22:37

by Arend Van Spriel

[permalink] [raw]
Subject: Re: [2/3] mwifiex: support sysfs initiated device coredump

On 3/13/2018 9:19 PM, Marcel Holtmann wrote:
> Hi Arend,
>
>>>>>> Since commit 3c47d19ff4dc ("drivers: base: add coredump driver ops")
>>>>>> it is possible to initiate a device coredump from user-space. This
>>>>>> patch adds support for it adding the .coredump() driver callback.
>>>>>> As there is no longer a need to initiate it through debugfs remove
>>>>>> that code.
>>>>>>
>>>>>> Signed-off-by: Arend van Spriel <[email protected]>
>>>>>
>>>>> Based on the discussion I assume this is ok to take to w-d-next. If that's not
>>>>> the case, please let me know ASAP.
>>>>
>>>> It is up to the mwifiex maintainers to decide, I guess. The ABI
>>>> documentation need to be revised and change the callback to void
>>>> return type. I am not sure what the best approach is. 1) apply this
>>>> and fix return type later, or 2) fix return type and resubmit this.
>>>> What is your opinion?
>>>
>>> I guess the callback change will go through Greg's tree? Then I suspect
>>> it's easier that you submit the callback change to Greg first and wait
>>> for it to trickle down to wireless-drivers-next (after the next merge
>>> window) and then I can apply the driver patches. Otherwise there might
>>> be a conflict between my and Greg's tree.
>>
>> That was my assessment, but unfortunately Marcel already applied the btmrvl patch before I could reply. So how do I move from here? Option 1) revert brmrvl and fix callback return type, or 2) apply mwifiex patch and fix callback return type later for both drivers.
>
> I can take the patch back out of bluetooth-next if needed. It is your call.

Thanks, Marcel

Let's go for that. Please revert/remove the patch.

Regards,
Arend