Re: [PATCH] ACPI, APEI, Fix error return value in apei_map_generic_address()

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Nov 10, 2020 at 12:29:42AM -0800, yaoaili126@163.com wrote:
> From: Aili Yao <yaoaili@kingsoft.com>
> 
> >From commit 6915564dc5a8 ("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: 6915564dc5a8 ("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>
> ---
>  drivers/acpi/apei/apei-base.c | 4 ++++
>  1 file changed, 4 insertions(+)

I'm confused as to what you are asking us to do with this patch?  Have
you read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly?

thanks,

greg k-h