ACPICA: acpidump: Fix repetitive table dump in -n mode.

In "-n" mode, reserved tables (RSDP/RSDT/XSDT/DSDT/FACS) are dumped
multiple times due a missing instance check in osl_get_bios_table().
This patch fixes this issue.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
index ba7bad04dff1..28c52008e854 100644
--- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
+++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
@@ -783,6 +783,10 @@ osl_get_bios_table(char *signature,
             ACPI_COMPARE_NAME(signature, ACPI_SIG_XSDT) ||
             ACPI_COMPARE_NAME(signature, ACPI_SIG_DSDT) ||
             ACPI_COMPARE_NAME(signature, ACPI_SIG_FACS)) {
+                if (instance > 0) {
+                        return (AE_LIMIT);
+                }
+
                 /*
                  * Get the appropriate address, either 32-bit or 64-bit. Be very
                  * careful about the FADT length and validate table addresses.