ARCv2: cache: fix slc_entire_op: flush only instead of flush-n-inv

slc_entire_op with OP_FLUSH command also invalidates it.

This is a preventive fix as the current use of slc_entire_op is only
with OP_FLUSH_N_INV where the invalidate is required.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
[vgupta: fixed changelog]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
index eee924dfffa6e1baf08221ee5e7e2cd23937d782..2072f3451e9c2127a076873113292a8ae2b5b9cb 100644 (file)
--- a/arch/arc/mm/cache.c
+++ b/arch/arc/mm/cache.c
@@ -780,7 +780,10 @@ noinline static void slc_entire_op(const int op)
 
        write_aux_reg(r, ctrl);
 
-       write_aux_reg(ARC_REG_SLC_INVALIDATE, 1);
+       if (op & OP_INV)        /* Inv or flush-n-inv use same cmd reg */
+               write_aux_reg(ARC_REG_SLC_INVALIDATE, 0x1);
+       else
+               write_aux_reg(ARC_REG_SLC_FLUSH, 0x1);
 
        /* Make sure "busy" bit reports correct stataus, see STAR 9001165532 */
        read_aux_reg(r);