linux-kernel - [PATCH] Documentation: ACPI: EINJ: Fix obsolete example

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Date:   Tue, 19 Jul 2022 19:50:13 +0800
From:   Qifu Zhang <zhangqifu@...edance.com>
To:     rafael@...nel.org
Cc:     lenb@...nel.org, jarkko@...nel.org, tony.luck@...el.com,
        dave.hansen@...ux.intel.com, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, Qifu Zhang <zhangqifu@...edance.com>
Subject: [PATCH] Documentation: ACPI: EINJ: Fix obsolete example

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@...edance.com>
---
 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