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    Subject[PATCH 5.4 301/389] Documentation: ACPI: EINJ: Fix obsolete example
    Date
    From: Qifu Zhang <zhangqifu@bytedance.com>

    commit 9066e151c37950af92c3be6a7270daa8e8063db9 upstream.

    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.

    Fixes: 488dac0c9237 ("libfs: fix error cast of negative value in simple_attr_write()")
    Signed-off-by: Qifu Zhang <zhangqifu@bytedance.com>
    Reviewed-by: Tony Luck <tony.luck@intel.com>
    Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    Documentation/firmware-guide/acpi/apei/einj.rst | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- 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


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