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ACPI, APEI, Fix error return value in apei_map_generic_address()

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From commit 6915564dc5 ("ACPI: OSL: Change the type of
acpi_os_map_generic_address() return value"),
acpi_os_map_generic_address() will return logical address or NULL
for error, but for ACPI_ADR_SPACE_SYSTEM_IO case, it should be also
return 0 as it's a normal case, but now it will return -ENXIO.

So check it out for such case to avoid einj module initialization
fail.

Fixes: 6915564dc5 ("ACPI: OSL: Change the type of acpi_os_map_generic_address() return value")
Cc: <stable@vger.kernel.org>
Reviewed-by: James Morse <james.morse@arm.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Aili Yao <yaoaili@kingsoft.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Aili Yao 2020-11-10 00:33:34 -08:00 committed by Rafael J. Wysocki
parent 09162bc32c
commit 4fba15fbb8
1 changed files with 4 additions and 0 deletions
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4
drivers/acpi/apei/apei-base.c
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@ -633,6 +633,10 @@ int apei_map_generic_address(struct acpi_generic_address *reg)
if (rc)
return rc;
/* IO space doesn't need mapping */
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
return 0;
if (!acpi_os_map_generic_address(reg))
return -ENXIO;