[PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Sui Jingfeng]

As some arch(m68k for example) doesn't have config_pci enabled, drivers[1]
call pci_clear_master() without config_pci guard can not pass compile test.

   drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c:
   In function 'etnaviv_gpu_pci_fini':
>> drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c:32:9:
   error: implicit declaration of function 'pci_clear_master';
   did you mean 'pci_set_master'? [-Werror=implicit-function-declaration]
      32 |         pci_clear_master(pdev);
         |         ^~~~~~~~~~~~~~~~
         |         pci_set_master
   cc1: some warnings being treated as errors

[1] https://patchwork.freedesktop.org/patch/539977/?series=118522&rev=1

V2:
	* Adjust commit log style to meet the convention and add Fixes tag

Fixes: 6a479079c072 ("PCI: Add pci_clear_master() as opposite of pci_set_master()")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202305301659.4guSLavL-lkp@intel.com/
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
---
 include/linux/pci.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/pci.h b/include/linux/pci.h
index d0c19ff0c958..71c85380676c 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1904,6 +1904,7 @@ static inline int pci_dev_present(const struct pci_device_id *ids)
 #define pci_dev_put(dev)	do { } while (0)
 
 static inline void pci_set_master(struct pci_dev *dev) { }
+static inline void pci_clear_master(struct pci_dev *dev) { }
 static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
 static inline void pci_disable_device(struct pci_dev *dev) { }
 static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
-- 
2.25.1

Re: [PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Bjorn Helgaas]

On Wed, May 31, 2023 at 06:27:44PM +0800, Sui Jingfeng wrote:
> As some arch(m68k for example) doesn't have config_pci enabled, drivers[1]
> call pci_clear_master() without config_pci guard can not pass compile test.
> 
>    drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c:
>    In function 'etnaviv_gpu_pci_fini':
> >> drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c:32:9:
>    error: implicit declaration of function 'pci_clear_master';
>    did you mean 'pci_set_master'? [-Werror=implicit-function-declaration]
>       32 |         pci_clear_master(pdev);
>          |         ^~~~~~~~~~~~~~~~
>          |         pci_set_master
>    cc1: some warnings being treated as errors
> 
> [1] https://patchwork.freedesktop.org/patch/539977/?series=118522&rev=1
> 
> V2:
> 	* Adjust commit log style to meet the convention and add Fixes tag
> 
> Fixes: 6a479079c072 ("PCI: Add pci_clear_master() as opposite of pci_set_master()")
> Reported-by: kernel test robot <lkp@intel.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202305301659.4guSLavL-lkp@intel.com/
> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>

Applied to pci/misc for v6.5 as follows:

  Author: Sui Jingfeng <suijingfeng@loongson.cn>
  Date:   Wed May 31 18:27:44 2023 +0800

    PCI: Add pci_clear_master() stub for non-CONFIG_PCI
    
    Add a pci_clear_master() stub when CONFIG_PCI is not set so drivers that
    support both PCI and platform devices don't need #ifdefs or extra Kconfig
    symbols for the PCI parts.
    
    [bhelgaas: commit log]
    Fixes: 6a479079c072 ("PCI: Add pci_clear_master() as opposite of pci_set_master()")
    Link: https://lore.kernel.org/r/20230531102744.2354313-1-suijingfeng@loongson.cn
    Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
    Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
    Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>

> ---
>  include/linux/pci.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index d0c19ff0c958..71c85380676c 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -1904,6 +1904,7 @@ static inline int pci_dev_present(const struct pci_device_id *ids)
>  #define pci_dev_put(dev)	do { } while (0)
>  
>  static inline void pci_set_master(struct pci_dev *dev) { }
> +static inline void pci_clear_master(struct pci_dev *dev) { }
>  static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
>  static inline void pci_disable_device(struct pci_dev *dev) { }
>  static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
> -- 
> 2.25.1
> 

Re: [PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Sui Jingfeng]

Hi,


Thanks a lot.

Can you receive my email?

I reply several email to you, but Thunderbird told me that may mail is 
returned.

Maybe you could read the content at lore.

```

The recipient's server is busy or down now.
SMTP error, OPEN: Host kernel.org(35.85.114.177) OPEN said 521 5.7.1 Service unavailable; client [114.242.206.163] blocked using zen.spamhaus.org

```


On 2023/6/1 01:28, Bjorn Helgaas wrote:
> On Wed, May 31, 2023 at 06:27:44PM +0800, Sui Jingfeng wrote:
>> As some arch(m68k for example) doesn't have config_pci enabled, drivers[1]
>> call pci_clear_master() without config_pci guard can not pass compile test.
>>
>>     drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c:
>>     In function 'etnaviv_gpu_pci_fini':
>>>> drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c:32:9:
>>     error: implicit declaration of function 'pci_clear_master';
>>     did you mean 'pci_set_master'? [-Werror=implicit-function-declaration]
>>        32 |         pci_clear_master(pdev);
>>           |         ^~~~~~~~~~~~~~~~
>>           |         pci_set_master
>>     cc1: some warnings being treated as errors
>>
>> [1] https://patchwork.freedesktop.org/patch/539977/?series=118522&rev=1
>>
>> V2:
>> 	* Adjust commit log style to meet the convention and add Fixes tag
>>
>> Fixes: 6a479079c072 ("PCI: Add pci_clear_master() as opposite of pci_set_master()")
>> Reported-by: kernel test robot <lkp@intel.com>
>> Closes: https://lore.kernel.org/oe-kbuild-all/202305301659.4guSLavL-lkp@intel.com/
>> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
>> Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
> Applied to pci/misc for v6.5 as follows:
>
>    Author: Sui Jingfeng <suijingfeng@loongson.cn>
>    Date:   Wed May 31 18:27:44 2023 +0800
>
>      PCI: Add pci_clear_master() stub for non-CONFIG_PCI
>      
>      Add a pci_clear_master() stub when CONFIG_PCI is not set so drivers that
>      support both PCI and platform devices don't need #ifdefs or extra Kconfig
>      symbols for the PCI parts.
>      
>      [bhelgaas: commit log]
>      Fixes: 6a479079c072 ("PCI: Add pci_clear_master() as opposite of pci_set_master()")
>      Link: https://lore.kernel.org/r/20230531102744.2354313-1-suijingfeng@loongson.cn
>      Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
>      Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
>      Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
>
>> ---
>>   include/linux/pci.h | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/include/linux/pci.h b/include/linux/pci.h
>> index d0c19ff0c958..71c85380676c 100644
>> --- a/include/linux/pci.h
>> +++ b/include/linux/pci.h
>> @@ -1904,6 +1904,7 @@ static inline int pci_dev_present(const struct pci_device_id *ids)
>>   #define pci_dev_put(dev)	do { } while (0)
>>   
>>   static inline void pci_set_master(struct pci_dev *dev) { }
>> +static inline void pci_clear_master(struct pci_dev *dev) { }
>>   static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
>>   static inline void pci_disable_device(struct pci_dev *dev) { }
>>   static inline int pcim_enable_device(struct pci_dev *pdev) { return -EIO; }
>> -- 
>> 2.25.1
>>

Re: [PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Bjorn Helgaas]

On Thu, Jun 01, 2023 at 01:44:52AM +0800, Sui Jingfeng wrote:
> Can you receive my email?
> 
> I reply several email to you, but Thunderbird told me that may mail is
> returned.
> 
> Maybe you could read the content at lore.

I do receive your email (at least some; obviously if there are things
I don't receive I wouldn't know).  I read most Linux email via lei [1],
so if it shows up on lore, I should see it.

Bjorn

[1] https://people.kernel.org/monsieuricon/lore-lei-part-1-getting-started

Re: [PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Sui Jingfeng]

Hi, Dear Bjorn


Where is the formal(unstream) PCI git branch where we could see the 
latest patch ?


On 2023/6/1 02:03, Bjorn Helgaas wrote:
> On Thu, Jun 01, 2023 at 01:44:52AM +0800, Sui Jingfeng wrote:
>> Can you receive my email?
>>
>> I reply several email to you, but Thunderbird told me that may mail is
>> returned.
>>
>> Maybe you could read the content at lore.
> I do receive your email (at least some; obviously if there are things
> I don't receive I wouldn't know).  I read most Linux email via lei [1],
> so if it shows up on lore, I should see it.
>
> Bjorn
>
> [1] https://people.kernel.org/monsieuricon/lore-lei-part-1-getting-started

Thanks for the link.

Re: [PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Bjorn Helgaas]

On Tue, Jun 20, 2023 at 12:04:40PM +0800, Sui Jingfeng wrote:
> Where is the formal(unstream) PCI git branch where we could see the latest
> patch ?

Here's the "misc" branch: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=misc

And here's the "next" branch that will be merged for v6.5, which
includes "misc" and other things: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=next

Re: [PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Sui Jingfeng]

Hi,

On 2023/6/20 19:06, Bjorn Helgaas wrote:
> On Tue, Jun 20, 2023 at 12:04:40PM +0800, Sui Jingfeng wrote:
>> Where is the formal(unstream) PCI git branch where we could see the latest
>> patch ?
> Here's the "misc" branch: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=misc
>
> And here's the "next" branch that will be merged for v6.5, which
> includes "misc" and other things: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=next


Thanks for you kindness reply and guidance, now I know that.

Re: [PATCH v2] PCI: Add dummy implement for pci_clear_master() function

[Bjorn Helgaas]

On Tue, Jun 20, 2023 at 06:06:00AM -0500, Bjorn Helgaas wrote:
> On Tue, Jun 20, 2023 at 12:04:40PM +0800, Sui Jingfeng wrote:
> > Where is the formal(unstream) PCI git branch where we could see the latest
> > patch ?
> 
> Here's the "misc" branch: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=misc
> 
> And here's the "next" branch that will be merged for v6.5, which
> includes "misc" and other things: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git/log/?h=next

I forgot to mention: in case you need to find other git branches, most
subsystems list this in the MAINTAINERS file, e.g.,

  PCI SUBSYSTEM
  ...
  T:      git git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git