Re: [PATCH] Drivers: hv: Use meaningful errnos for hypercall status codes
Wei Liu <[email protected]>
| Newsgroups | org.kernel.vger.linux-kernel,org.kernel.vger.linux-hyperv |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Jul 27, 2026 at 09:11:01PM +0000, Hardik Garg wrote:
> Commit 3817854ba892 ("hyperv: Log hypercall status codes as strings")
> converted hv_result_to_errno() from a switch to a table and added status
> codes used for string logging. Statuses without an existing specific
> mapping were assigned the generic -EIO fallback even when a more specific
> errno was available.
>
> Map HV_STATUS_ACCESS_DENIED and HV_STATUS_OPERATION_DENIED to -EACCES,
> HV_STATUS_UNKNOWN_PROPERTY and HV_STATUS_PROPERTY_VALUE_OUT_OF_RANGE to
> -EINVAL, and HV_STATUS_PROCESSOR_FEATURE_NOT_SUPPORTED to -EOPNOTSUPP.
> This lets callers distinguish permission, argument, and capability
> failures from generic I/O errors.
>
> The table conversion also added duplicate HV_STATUS_INVALID_LP_INDEX and
> HV_STATUS_INVALID_REGISTER_VALUE entries. Remove the later -EIO entries,
> which are unreachable because find_hv_status_info() returns the first
> match.
>
> Signed-off-by: Hardik Garg <[email protected]>
Applied. Thanks.
Wei