Re: [RESEND PATCH v6 3/3] usb: dwc3: Pass quirk as platform data

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On 5.1.2021 11.30, Tejas Joglekar wrote:
> Hi Mathias,
> On 1/4/2021 9:13 PM, Greg Kroah-Hartman wrote:
>> On Mon, Jan 04, 2021 at 09:32:13AM +0000, Tejas Joglekar wrote:
>>> Hi Greg,
>>> On 1/4/2021 1:55 PM, Greg Kroah-Hartman wrote:
>>>> On Mon, Jan 04, 2021 at 01:38:43PM +0530, Tejas Joglekar wrote:
>>>>> This commit adds the platform device data to setup
>>>>> the XHCI_SG_TRB_CACHE_SIZE_QUIRK quirk. DWC3 hosts
>>>>> which are PCI devices does not use OF to create platform device
>>>>> but create xhci-plat platform device at runtime. So
>>>>> this patch allows parent device to supply the quirk
>>>>> through platform data.
>>>>>
>>>>> Signed-off-by: Tejas Joglekar <joglekar@xxxxxxxxxxxx>
>>>>> ---
>>>>>  drivers/usb/dwc3/host.c | 10 ++++++++++
>>>>>  1 file changed, 10 insertions(+)
>>>> What changed from previous versions?
>>> Resent the patch as it was missed for review by Felipe and I saw your mail
>>>
>>> to resend the patch if not reviewed. Other two patches from series are
>>>
>>> picked up by Mathias, this one is remaining for review.
>> Ah, how was I supposed to guess that?  :)
>>
>>>>> diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
>>>>> index e195176580de..0434bc8cec12 100644
>>>>> --- a/drivers/usb/dwc3/host.c
>>>>> +++ b/drivers/usb/dwc3/host.c
>>>>> @@ -11,6 +11,11 @@
>>>>>  #include <linux/platform_device.h>
>>>>>  
>>>>>  #include "core.h"
>>>>> +#include "../host/xhci-plat.h"
>>>> That feels really wrong.  Are you sure about that?
>>> To use the struct xhci_plat_priv this was included, can you suggest alternative?
>> If that is the "normal" way to do this with the xhci driver, ok, but I
>> would like to get an ack from Mathias for this before taking it.
>>
> Can you please review this patch which is including the xhci-plat header?  Let me
> 
> know if anything should be modified. Ack if this patch looks ok so Greg can
> 
> take it.
> 

This doesn't look right. 

dwc3 shouldn't need to know about xhci platform private structures,
besides, this patch now adds the quirk to all xhci platform devices created by dwc3.

I haven't touched dwc3 at all, but I'd guess you probably need to add a new entry to
the dwc3_pci_id_table[] in dwc3-pci.c, add a device property, and then look for that
property in xhci-plat.c, and set the quirk. 

-Mathias



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