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-rw-r--r--arch/powerpc/kernel/rtas.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index a6fce3106e02..693133972294 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -1071,7 +1071,7 @@ static struct rtas_filter rtas_filters[] __ro_after_init = {
{ "get-time-of-day", -1, -1, -1, -1, -1 },
{ "ibm,get-vpd", -1, 0, -1, 1, 2 },
{ "ibm,lpar-perftools", -1, 2, 3, -1, -1 },
- { "ibm,platform-dump", -1, 4, 5, -1, -1 },
+ { "ibm,platform-dump", -1, 4, 5, -1, -1 }, /* Special cased */
{ "ibm,read-slot-reset-state", -1, -1, -1, -1, -1 },
{ "ibm,scan-log-dump", -1, 0, 1, -1, -1 },
{ "ibm,set-dynamic-indicator", -1, 2, -1, -1, -1 },
@@ -1120,6 +1120,15 @@ static bool block_rtas_call(int token, int nargs,
size = 1;
end = base + size - 1;
+
+ /*
+ * Special case for ibm,platform-dump - NULL buffer
+ * address is used to indicate end of dump processing
+ */
+ if (!strcmp(f->name, "ibm,platform-dump") &&
+ base == 0)
+ return false;
+
if (!in_rmo_buf(base, end))
goto err;
}