diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/rtas.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index c1403dc4fd66..9bb43aa53d43 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -476,6 +476,11 @@ int rtas_call(int token, int nargs, int nret, int *outputs, ...) if (!rtas.entry || token == RTAS_UNKNOWN_SERVICE) return -1; + if ((mfmsr() & (MSR_IR|MSR_DR)) != (MSR_IR|MSR_DR)) { + WARN_ON_ONCE(1); + return -1; + } + s = lock_rtas(); /* We use the global rtas args buffer */ |