linux-kernel - Re: [PATCH v4 2/5] PCI/ERR: Rename error reporting to generic pci naming

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Date:   Wed, 17 Jan 2018 14:00:40 +0530
From:   poza@...eaurora.org
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dongdong Liu <liudongdong3@...wei.com>,
        Keith Busch <keith.busch@...el.com>, Wei Zhang <wzhang@...com>,
        Sinan Kaya <okaya@...eaurora.org>,
        Timur Tabi <timur@...eaurora.org>
Subject: Re: [PATCH v4 2/5] PCI/ERR: Rename error reporting to generic pci
 naming

On 2018-01-17 13:54, poza@...eaurora.org wrote:
> On 2018-01-17 06:46, Bjorn Helgaas wrote:
>> On Tue, Jan 16, 2018 at 03:28:40PM +0530, Oza Pawandeep wrote:
>>> This patch renames error reporting to generic function with pci 
>>> prefix
>>> 
>>> Signed-off-by: Oza Pawandeep <poza@...eaurora.org>
>>> 
>>> diff --git a/drivers/pci/pcie/aer/aerdrv_core.c 
>>> b/drivers/pci/pcie/aer/aerdrv_core.c
>>> index 4fda843..5ed9575 100644
>>> --- a/drivers/pci/pcie/aer/aerdrv_core.c
>>> +++ b/drivers/pci/pcie/aer/aerdrv_core.c
>>> @@ -285,7 +285,7 @@ static void handle_error_source(struct 
>>> pcie_device *aerdev,
>>>  			pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS,
>>>  					info->status);
>>>  	} else
>>> -		do_recovery(dev, info->severity);
>>> +		pci_do_recovery(dev, info->severity);
>>>  }
>>> 
>>>  #ifdef CONFIG_ACPI_APEI_PCIEAER
>>> @@ -349,7 +349,7 @@ static void aer_recover_work_func(struct 
>>> work_struct *work)
>>>  			continue;
>>>  		}
>>>  		cper_print_aer(pdev, entry.severity, entry.regs);
>>> -		do_recovery(pdev, entry.severity);
>>> +		pci_do_recovery(pdev, entry.severity);
>>>  		pci_dev_put(pdev);
>>>  	}
>>>  }
>>> diff --git a/drivers/pci/pcie/pcie-err.c 
>>> b/drivers/pci/pcie/pcie-err.c
>>> index 76e66bb..5792a9f 100644
>>> --- a/drivers/pci/pcie/pcie-err.c
>>> +++ b/drivers/pci/pcie/pcie-err.c
>>> @@ -20,12 +20,12 @@
>>>  #include <linux/pcieport_if.h>
>>>  #include "portdrv.h"
>>> 
>>> -struct aer_broadcast_data {
>>> +struct pci_err_broadcast_data {
>>>  	enum pci_channel_state state;
>>>  	enum pci_ers_result result;
>>>  };
>>> 
>>> -pci_ers_result_t merge_result(enum pci_ers_result orig,
>>> +pci_ers_result_t pci_merge_result(enum pci_ers_result orig,
>> 
>> Most of these functions started out static in aerdrv_core.c and should
>> remain static.  Therefore, they do not need to be renamed.  Same for
>> the struct aer_broadcast_data.

ok so in conclusion I should rename only do_recovery. nothing else to be 
renamed.
and keep the functions static after moving them to pci_err.c.

Regards,
Oza.

>> 
>>> diff --git a/include/linux/pci.h b/include/linux/pci.h
>>> index 46fd243..babcd89 100644
>>> --- a/include/linux/pci.h
>>> +++ b/include/linux/pci.h
>>> @@ -1998,7 +1998,7 @@ static inline resource_size_t 
>>> pci_iov_resource_size(struct pci_dev *dev, int res
>>>  void pci_hp_remove_module_link(struct pci_slot *pci_slot);
>>>  #endif
>>> 
>>> -void do_recovery(struct pci_dev *dev, int severity);
>>> +void pci_do_recovery(struct pci_dev *dev, int severity);
>> 
>> This one started out static and now needs to be non-static so you can
>> call it both from aerdrv_core.c and pcie-dpc.c.
>> 
>> But it should not be exposed outside the PCI core, so the declaration
>> should go in drivers/pci/pcie/aer/aerdrv.h or at most
>> drivers/pci/pci.h.
>> 
>> The rename should happen before the move out of aerdrv_core.c, i.e.,
>> reorder patches 1 and 2.
> 
> ok so let me confirm. you would like to see renaming but that should
> happen right in patch1.
> and then move all the error reporting to pcie_err.c
> is that correct ?
> 
> 
> besides, I am thinking to move
> pci_do_recovery and removing everything from include/linux/pci.h
> (which you suggested already)
> but along with that....following defines will move in driver/pci/pci.h
> 
> #define PCI_ERR_AER_NONFATAL           0
> #define PCI_ERR_AER_FATAL              1
> #define PCI_ERR_AER_CORRECTABLE        2
> #define PCI_ERR_DPC_NONFATAL           4
> 
> because, error codes have to be unified at one place.
> 
> will work on this and post the patch-set soon.
> 
> Regards,
> Oza.
> 
>> 
>>>  /**
>>>   * pci_pcie_cap - get the saved PCIe capability offset
>>> --
>>> Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm 
>>> Technologies, Inc.,
>>> a Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a 
>>> Linux Foundation Collaborative Project.
>>>