On Tue, Jul 19, 2022 at 07:50:13PM +0800, Qifu Zhang wrote:
> Since commit 488dac0c9237 ("libfs: fix error cast of negative value in
> simple_attr_write()"), the EINJ debugfs interface no longer accepts
> negative values as input. Attempt to do so will result in EINVAL.
>
> Signed-off-by: Qifu Zhang <zhangqifu@xxxxxxxxxxxxx>
Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx>
> ---
> Documentation/firmware-guide/acpi/apei/einj.rst | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Documentation/firmware-guide/acpi/apei/einj.rst b/Documentation/firmware-guide/acpi/apei/einj.rst
> index 55e2331a6438..d6b61d22f525 100644
> --- a/Documentation/firmware-guide/acpi/apei/einj.rst
> +++ b/Documentation/firmware-guide/acpi/apei/einj.rst
> @@ -168,7 +168,7 @@ An error injection example::
> 0x00000008 Memory Correctable
> 0x00000010 Memory Uncorrectable non-fatal
> # echo 0x12345000 > param1 # Set memory address for injection
> - # echo $((-1 << 12)) > param2 # Mask 0xfffffffffffff000 - anywhere in this page
> + # echo 0xfffffffffffff000 > param2 # Mask - anywhere in this page
> # echo 0x8 > error_type # Choose correctable memory error
> # echo 1 > error_inject # Inject now
>
> --
> 2.20.1
>
