Re: [PATCH] uio_hv_generic: Bind to FCopy device by default

[Naman Jain <namjain@linux.microsoft.com>]

On 5/26/2026 8:45 PM, Michael Kelley wrote:
> From: Naman Jain <namjain@linux.microsoft.com> Sent: Tuesday, May 26, 2026 3:10 AM
>>
>> On 5/26/2026 1:59 PM, Ben Hutchings wrote:
>>> On Tue, 2026-05-26 at 12:15 +0530, Naman Jain wrote:
>>>>
>>>> On 5/25/2026 5:34 PM, Ben Hutchings wrote:
>>>>> The Hyper-V kernel-mode fcopy driver was removed in 6.10 and the new
>>>>> fcopy daemon requires this uio driver to function.  However, by
>>>>> default the driver does not bind to any devices, and must be
>>>>> configured through the sysfs "new_id" file.
>>>>>
>>>>> Since the FCopy device is now only usable through this driver, add its
>>>>> ID to the driver's ID table so that the daemon will work "out of the
>>>>> box".
>>>>>
>>>>> Signed-off-by: Ben Hutchings <benh@debian.org>
>>>>> Fixes: ec314f61e4fc ("Drivers: hv: Remove fcopy driver")
>>>>> ---
>>>>> --- a/drivers/uio/uio_hv_generic.c
>>>>> +++ b/drivers/uio/uio_hv_generic.c
>>>>> @@ -395,9 +395,15 @@ hv_uio_remove(struct hv_device *dev)
>>>>>     	vmbus_free_ring(dev->channel);
>>>>>     }
>>>>>
>>>>> +static const struct hv_vmbus_device_id hv_uio_id_table[] = {
>>>>> +	{ HV_FCOPY_GUID },
>>>>> +	{}
>>>>> +};
>>>>> +MODULE_DEVICE_TABLE(vmbus, hv_uio_id_table);
>>>>> +
>>>>>     static struct hv_driver hv_uio_drv = {
>>>>>     	.name = "uio_hv_generic",
>>>>> -	.id_table = NULL, /* only dynamic id's */
>>>>> +	.id_table = hv_uio_id_table,
>>>>>     	.probe = hv_uio_probe,
>>>>>     	.remove = hv_uio_remove,
>>>>>     };
>>>>
>>
>> ++ recipients, assuming you mistakenly clicked reply instead of reply all.
> 
> Ben --
> 
> Regarding recipients, please include the full LKML
> (linux-kernel@vger.kernel.org) on the original patch posting, even
> though it is about a narrow Hyper-V issue. I dabble in areas beyond
> just Hyper-V so subscribe to the full LKML instead of the
> linux-hyperv mailing list. I miss patches like this one unless I happen
> to be looking through the lore.kernel.org archives for linux-hyperv.
> 
> Thx,
> 
> Michael
> 
Sashiko also misses out on such patches if linux-kernel@vger.kernel.org 
is not included. I could not find this in https://sashiko.dev/#/.

Regards,
Naman