On 24K we did always disable cache parity protection - obviously not

the greatest thing to do.  Try to enable parity protection, check if
we actually succeeded and print a message about the outcome of this.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index a53b1ed..d06db5f 100644 (file)
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -736,16 +736,12 @@ static inline void parity_protection_init(void)
 {
        switch (current_cpu_data.cputype) {
        case CPU_24K:
-               /* 24K cache parity not currently implemented in FPGA */
-               printk(KERN_INFO "Disable cache parity protection for "
-                      "MIPS 24K CPU.\n");
-               write_c0_ecc(read_c0_ecc() & ~0x80000000);
-               break;
        case CPU_5KC:
-               /* Set the PE bit (bit 31) in the c0_ecc register. */
-               printk(KERN_INFO "Enable cache parity protection for "
-                      "MIPS 5KC/24K CPUs.\n");
-               write_c0_ecc(read_c0_ecc() | 0x80000000);
+               write_c0_ecc(0x80000000);
+               back_to_back_c0_hazard();
+               /* Set the PE bit (bit 31) in the c0_errctl register. */
+               printk(KERN_INFO "Cache parity protection %sabled\n",
+                      (read_c0_ecc() & 0x80000000) ? "en" : "dis");
                break;
        case CPU_20KC:
        case CPU_25KF: