linux-kernel - Re: [PATCH 5.15 00/71] 5.15.157-rc1 review

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Date: Wed, 24 Apr 2024 11:21:05 +0200
From: Peter Oberparleiter <oberpar@...ux.ibm.com>
To: Naresh Kamboju <naresh.kamboju@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev,
        linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org,
        patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de,
        jonathanh@...dia.com, f.fainelli@...il.com, sudipm.mukherjee@...il.com,
        srw@...dewatkins.net, rwarsow@....de, conor@...nel.org,
        allen.lkml@...il.com, broonie@...nel.org, linux-s390@...r.kernel.org,
        Alexandra Winter <wintera@...ux.ibm.com>
Subject: Re: [PATCH 5.15 00/71] 5.15.157-rc1 review

On 24.04.2024 09:57, Naresh Kamboju wrote:
> On Wed, 24 Apr 2024 at 03:16, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
>>
>> This is the start of the stable review cycle for the 5.15.157 release.
>> There are 71 patches in this series, all will be posted as a response
>> to this one.  If anyone has any issues with these being applied, please
>> let me know.
>>
>> Responses should be made by Thu, 25 Apr 2024 21:38:28 +0000.
>> Anything received after that time might be too late.
>>
>> The whole patch series can be found in one patch at:
>>         https://www.kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.15.157-rc1.gz
>> or in the git tree and branch at:
>>         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.15.y
>> and the diffstat can be found below.
>>
>> thanks,
>>
>> greg k-h
> 
> 
> The s390 defconfig build failed with gcc-12 and clang-17 on the Linux
> stable-rc linux.5.15.y branch.
> 
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
> 
> Build log:
> ---
> drivers/s390/cio/qdio_main.c: In function 'qdio_int_handler':
> drivers/s390/cio/qdio_main.c:761:52: error: incompatible type for
> argument 2 of 'ccw_device_start'
>   761 |                 rc = ccw_device_start(cdev, irq_ptr->ccw,
> intparm, 0, 0);
>       |                                             ~~~~~~~^~~~~
>       |                                                    |
>       |                                                    struct ccw1
> In file included from arch/s390/include/asm/qdio.h:13,
>                  from drivers/s390/cio/qdio_main.c:18:
> arch/s390/include/asm/ccwdev.h:172:50: note: expected 'struct ccw1 *'
> but argument is of type 'struct ccw1'
>   172 | extern int ccw_device_start(struct ccw_device *, struct ccw1 *,
>       |                                                  ^~~~~~~~~~~~~
> make[3]: *** [scripts/Makefile.build:289: drivers/s390/cio/qdio_main.o] Error 1
> 
> 
> Suspected commit:
> --------
> s390/qdio: handle deferred cc1
>   [ Upstream commit 607638faf2ff1cede37458111496e7cc6c977f6f ]

This is due to a type change of field 'ccw' in 'struct qdio_irq' that
was introduced in v5.17 via commit 718ce9e10171 ("s390/qdio: avoid
allocating the qdio_irq with GFP_DMA").

The following change to commit 607638faf2ff ("s390/qdio: handle deferred
cc1") fixes the compile error on v5.15:

--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -758,7 +758,7 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,

 	if (rc == -EAGAIN) {
 		DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qint retry");
-		rc = ccw_device_start(cdev, irq_ptr->ccw, intparm, 0, 0);
+		rc = ccw_device_start(cdev, &irq_ptr->ccw, intparm, 0, 0);
 		if (!rc)
 			return;
 		DBF_ERROR("%4x RETRY ERR", irq_ptr->schid.sch_no);