sparc32, leon: Require separate snoop tags set to regard snooping to be enabled

Even if data snooping is enabled, without separate snoop tags snooping will not
work when the MMU is enabled.

Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h
index b836e9297f2a71c3084df4cd695109474856d72d..c2f6ff6d7a35aa041507a25d75b4dcc5c1c8ce20 100644 (file)
--- a/arch/sparc/include/asm/leon.h
+++ b/arch/sparc/include/asm/leon.h
@@ -108,7 +108,7 @@ static inline int sparc_leon3_snooping_enabled(void)
 {
        u32 cctrl;
        __asm__ __volatile__("lda [%%g0] 2, %0\n\t" : "=r"(cctrl));
-        return (cctrl >> 23) & 1;
+       return ((cctrl >> 23) & 1) && ((cctrl >> 17) & 1);
 };
 
 static inline void sparc_leon3_disable_cache(void)