linux-kernel - Re: [PATCH] platform/x86/siemens: simatic-ipc: fix nonsensical condition

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Date:   Sun, 13 Aug 2023 14:59:52 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Arnd Bergmann <arnd@...nel.org>
Cc:     Mark Gross <markgross@...nel.org>,
        "xingtong.wu" <xingtong.wu@...mens.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>,
        Henning Schild <henning.schild@...mens.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Lee Jones <lee@...nel.org>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH] platform/x86/siemens: simatic-ipc: fix nonsensical
 condition

Hi,

On 8/11/23 17:02, Arnd Bergmann wrote:
> On Fri, Aug 11, 2023, at 15:17, Ilpo Järvinen wrote:
>> On Fri, 11 Aug 2023, Arnd Bergmann wrote:
>>
>>> From: Arnd Bergmann <arnd@...db.de>
>>>
>>> The condition checking for a constant SIMATIC_IPC_DEVICE_BX_59A value
>>> clearly makes no sense, as clang warns:
>>>
>>> drivers/platform/x86/siemens/simatic-ipc.c:132:42: error: use of logical '||' with constant operand [-Werror,-Wconstant-logical-operand]
>>>                 if (ledmode == SIMATIC_IPC_DEVICE_227G || SIMATIC_IPC_DEVICE_BX_59A)
>>>                                                        ^  ~~~~~~~~~~~~~~~~~~~~~~~~~
>>> drivers/platform/x86/siemens/simatic-ipc-batt.c:197:49: error: use of logical '||' with constant operand [-Werror,-Wconstant-logical-operand]
>>>                 if (priv.devmode == SIMATIC_IPC_DEVICE_BX_21A || SIMATIC_IPC_DEVICE_BX_59A)
>>>                                                               ^  ~~~~~~~~~~~~~~~~~~~~~~~~~
>>>
>>> Most likely, this was meant to check ledmode to be one of the two values,
>>> so change it to that.
>>>
>>> Fixes: b8af77951941e ("platform/x86/siemens: simatic-ipc: add new models BX-56A/BX-59A")
>>> Fixes: c56beff203754 ("platform/x86/siemens: simatic-ipc-batt: add support for module BX-59A")
>>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> 
> Ok, I see. I missed those as there is hasn't been a new linux-next in
> a few days.
> 
> I suppose this one is also fixed then?
> 
> WARNING: unmet direct dependencies detected for P2SB
>   Depends on [n]: PCI [=n] && X86 [=y]
>   Selected by [m]:
>   - SIEMENS_SIMATIC_IPC_WDT [=m] && WATCHDOG [=y] && SIEMENS_SIMATIC_IPC [=y]
> drivers/platform/x86/p2sb.c:68:9: error: call to undeclared function 'pci_scan_single_device'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

No that one has not been fixed yet. This is the first time I've heard of this one. It seems to not have been caught by the LKP bot.

Regards,

Hans