[PATCH 2/3] MSI: Use __read_msi_msg() instead of read_msi_msg()

[Yijing Wang]

On 2014/8/21 17:38, Wei Yang wrote:
> On Fri, Aug 15, 2014 at 11:14:29AM +0800, Yijing Wang wrote:
>> Read_msi_msg() only be called in rtas_setup_msi_irqs(),
> 
>  read_msi_msg()
> 
> This code looks good to me, while I can't apply on top of 3.17-rc1.
> If you rebase it, it would be more convenient for maintainer to merge.

OK, thanks!

> 
>> use __read_msi_msg() instead of read_msi_msg for
>> simplification. And rename __read_msi_msg() to
>> read_msi_msg().
>>
>> Signed-off-by: Yijing Wang <wangyijing at huawei.com>
>> CC: Benjamin Herrenschmidt <benh at kernel.crashing.org>
>> CC: linuxppc-dev at lists.ozlabs.org
>> ---
>> arch/powerpc/platforms/pseries/msi.c |    2 +-
>> arch/x86/pci/xen.c                   |    2 +-
>> drivers/pci/msi.c                    |    9 +--------
>> include/linux/msi.h                  |    3 +--
>> 4 files changed, 4 insertions(+), 12 deletions(-)
>>
>> diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
>> index 0c882e8..591650b 100644
>> --- a/arch/powerpc/platforms/pseries/msi.c
>> +++ b/arch/powerpc/platforms/pseries/msi.c
>> @@ -484,7 +484,7 @@ again:
>> 		irq_set_msi_desc(virq, entry);
>>
>> 		/* Read config space back so we can restore after reset */
>> -		read_msi_msg(virq, &msg);
>> +		read_msi_msg(entry, &msg);
>> 		entry->msg = msg;
>> 	}
>>
>> diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
>> index 905956f..4656099 100644
>> --- a/arch/x86/pci/xen.c
>> +++ b/arch/x86/pci/xen.c
>> @@ -228,7 +228,7 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
>> 		return 1;
>>
>> 	list_for_each_entry(msidesc, &dev->msi_list, list) {
>> -		__read_msi_msg(msidesc, &msg);
>> +		read_msi_msg(msidesc, &msg);
>> 		pirq = MSI_ADDR_EXT_DEST_ID(msg.address_hi) |
>> 			((msg.address_lo >> MSI_ADDR_DEST_ID_SHIFT) & 0xff);
>> 		if (msg.data != XEN_PIRQ_MSI_DATA ||
>> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
>> index 988224f..cbb41d6 100644
>> --- a/drivers/pci/msi.c
>> +++ b/drivers/pci/msi.c
>> @@ -259,7 +259,7 @@ void default_restore_msi_irqs(struct pci_dev *dev)
>> 	}
>> }
>>
>> -void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>> +void read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>> {
>> 	BUG_ON(entry->dev->current_state != PCI_D0);
>>
>> @@ -289,13 +289,6 @@ void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>> 	}
>> }
>>
>> -void read_msi_msg(unsigned int irq, struct msi_msg *msg)
>> -{
>> -	struct msi_desc *entry = irq_get_msi_desc(irq);
>> -
>> -	__read_msi_msg(entry, msg);
>> -}
>> -
>> void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg)
>> {
>> 	/* Assert that the cache is valid, assuming that
>> diff --git a/include/linux/msi.h b/include/linux/msi.h
>> index e3adf93..4d7c0f5 100644
>> --- a/include/linux/msi.h
>> +++ b/include/linux/msi.h
>> @@ -15,10 +15,9 @@ struct irq_data;
>> struct msi_desc;
>> void mask_msi_irq(struct irq_data *data);
>> void unmask_msi_irq(struct irq_data *data);
>> -void __read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
>> +void read_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
>> void get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
>> void __write_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
>> -void read_msi_msg(unsigned int irq, struct msi_msg *msg);
>> void write_msi_msg(unsigned int irq, struct msi_msg *msg);
>>
>> struct msi_desc {
>> -- 
>> 1.7.1
>>
>> --
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> 


-- 
Thanks!
Yijing