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| author | Matt Redfearn <matt.redfearn@imgtec.com> | 2016-09-07 11:45:19 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-10-04 16:13:57 +0200 |
| commit | 4b6401365a6ccc53de820209cb328507a2103d30 (patch) | |
| tree | c0aff3b09632c91c738b48d625edd9f9168025b0 /arch/mips/kernel/smp.c | |
| parent | MIPS: pm-cps: Support CM3 changes to Coherence Enable Register (diff) | |
| download | linux-4b6401365a6ccc53de820209cb328507a2103d30.tar.xz linux-4b6401365a6ccc53de820209cb328507a2103d30.zip | |
MIPS: SMP: Wrap call to mips_cpc_lock_other in mips_cm_lock_other
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@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Qais Yousef <qsyousef@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/14227/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/smp.c')
| -rw-r--r-- | arch/mips/kernel/smp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index b0baf48951fa..cb02df215365 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(); } } } |