Drivers: hv: Use meaningful errnos for hypercall status codes

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Commit 3817854ba8 ("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 <hargar@linux.microsoft.com>
Reviewed-by: Naman Jain <namjain@linux.microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>

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Hardik Garg 2026-07-27 21:11:01 +00:00 • committed by Wei Liu

parent 8d3ae59288

commit e1fc6e70f3

1 changed files with 5 additions and 7 deletions

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drivers/hv/hv_common.c

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