[PATCH] powerpc/ps3: Set driver coherent_dma_mask

[Geoff Levand]

Hi Alan,

On 07/19/2018 07:33 AM, Alan Stern wrote:
> On Wed, 18 Jul 2018, Geoff Levand wrote:
> 
>> diff --git a/drivers/usb/host/ehci-ps3.c b/drivers/usb/host/ehci-ps3.c
>> index 8c733492d8fe..454d8c624a3f 100644
>> --- a/drivers/usb/host/ehci-ps3.c
>> +++ b/drivers/usb/host/ehci-ps3.c
>> @@ -86,7 +86,7 @@ static int ps3_ehci_probe(struct ps3_system_bus_device *dev)
>>  	int result;
>>  	struct usb_hcd *hcd;
>>  	unsigned int virq;
>> -	static u64 dummy_mask = DMA_BIT_MASK(32);
>> +	static u64 dummy_mask;
>>  
>>  	if (usb_disabled()) {
>>  		result = -ENODEV;
>> @@ -131,7 +131,9 @@ static int ps3_ehci_probe(struct ps3_system_bus_device *dev)
>>  		goto fail_irq;
>>  	}
>>  
>> -	dev->core.dma_mask = &dummy_mask; /* FIXME: for improper usb code */
>> +	dummy_mask = DMA_BIT_MASK(32);
>> +	dev->core.dma_mask = &dummy_mask;
>> +	dma_set_coherent_mask(&dev->core, dummy_mask);
> 
> What is the reason for changing a static initialization to a dynamic
> one?  As far as I can see, the patch touches four lines of code but the
> only real difference is addition of a single line (and removal of a 
> comment).

I thought it would be better if all the setting was done in
one place, that's the only reason.

-Geoff