[PATCH] ACPI: APEI: EINJ: warn on invalid argument when explicitly indicated by platform

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Fix to return -EINVAL in the __einj_error_inject() error handling case
instead of -EBUSY, when explicitly indicated by the platform in the status
of the completed operation.

Signed-off-by: Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx>
 drivers/acpi/apei/einj.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index b4373e575660..fa0b4320312e 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -489,9 +489,15 @@ static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
 	if (rc)
 		return rc;
 	val = apei_exec_ctx_get_output(&ctx);
+	if (val == EINJ_STATUS_FAIL)
 		return -EBUSY;
+	else if (val == EINJ_STATUS_INVAL)
+		return -EINVAL;
+	/*
+	 * The error is injected into the platform successfully, then it needs
+	 * to trigger the error.
+	 */
 	rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE);
 	if (rc)
 		return rc;

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