All calls to mips_cpc_lock_other should be wrapped in
mips_cm_lock_other. This only matters if the system has CM3 and is using
cpu idle, since otherwise a) the CPC lock is sufficent for CM < 3 and b)
any systems with CM > 3 have not been able to use cpu idle until now.
Signed-off-by: Matt Redfearn <matt.redfearn@xxxxxxxxxx>
Reviewed-by: Paul Burton <paul.burton@xxxxxxxxxx>
---
arch/mips/kernel/smp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index f95f094f36e4..78ccd5388654 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -192,9 +192,11 @@ void mips_smp_send_ipi_mask(const struct cpumask *mask, unsigned int action)
continue;
while (!cpumask_test_cpu(cpu, &cpu_coherent_mask)) {
+ mips_cm_lock_other(core, 0);
mips_cpc_lock_other(core);
write_cpc_co_cmd(CPC_Cx_CMD_PWRUP);
mips_cpc_unlock_other();
+ mips_cm_unlock_other();
}
}
}
--
2.7.4
