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| author |   Paul Burton <paul.burton@imgtec.com> | 2017-08-12 19:49:40 -0700 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2017-08-30 00:57:27 +0200 |
| commit | d595d423d06071bd7a4892c3c2f16bfe1d5b3a85 (patch) | |
| tree | babe4bf15082b7528e8c316dc0ec8630b0e24df9 /arch/mips/kernel/smp.c | |
| parent | MIPS: CM: Add cluster & block args to mips_cm_lock_other() (diff) | |
| download | linux-dev-d595d423d06071bd7a4892c3c2f16bfe1d5b3a85.tar.xz linux-dev-d595d423d06071bd7a4892c3c2f16bfe1d5b3a85.zip | |
MIPS: SMP: Allow boot_secondary SMP op to return errors
Allow the boot_secondary SMP op to return an error to __cpu_up(), which
will in turn return it to its caller.
This will allow SMP implementations to return errors quickly in cases
they they know have failed, rather than relying upon __cpu_up()
eventually timing out waiting for the cpu_running completion.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17014/
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 | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index 6248a5a3ec9e..a4a59ed0164c 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -439,7 +439,11 @@ void smp_prepare_boot_cpu(void) int __cpu_up(unsigned int cpu, struct task_struct *tidle) { - mp_ops->boot_secondary(cpu, tidle); + int err; + + err = mp_ops->boot_secondary(cpu, tidle); + if (err) + return err; /* * We must check for timeout here, as the CPU will not be marked |