diff options
| author | Thomas Bogendoerfer <tbogendoerfer@suse.de> | 2019-11-19 14:08:56 +0300 |
|---|---|---|
| committer | Paul Burton <paulburton@kernel.org> | 2019-11-22 21:56:14 +0300 |
| commit | e3d765a941f6130fd94e47b2064cfee71f4cbadd (patch) | |
| tree | 969b68ccb8c4ffa225995d8765a771838837cb5b /arch | |
| parent | 2bee1b58484f036e3e2dc657e524d095d0d332b3 (diff) | |
| download | linux-e3d765a941f6130fd94e47b2064cfee71f4cbadd.tar.xz | |
MIPS: SGI-IP27: Fix crash, when CPUs are disabled via nr_cpus parameter
If number of CPUs are limited by the kernel commandline parameter nr_cpus
assignment of interrupts accourding to numa rules might not be possibe.
As a fallback use one of the online CPUs as interrupt destination.
Fixes: 69a07a41d908 ("MIPS: SGI-IP27: rework HUB interrupts")
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/sgi-ip27/ip27-irq.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c index 5aef06e28a5b..c72ae330ea93 100644 --- a/arch/mips/sgi-ip27/ip27-irq.c +++ b/arch/mips/sgi-ip27/ip27-irq.c @@ -73,6 +73,9 @@ static void setup_hub_mask(struct hub_irq_data *hd, const struct cpumask *mask) int cpu; cpu = cpumask_first_and(mask, cpu_online_mask); + if (cpu >= nr_cpu_ids) + cpu = cpumask_any(cpu_online_mask); + nasid = cpu_to_node(cpu); hd->cpu = cpu; if (!cputoslice(cpu)) { @@ -139,6 +142,7 @@ static int hub_domain_alloc(struct irq_domain *domain, unsigned int virq, /* use CPU connected to nearest hub */ hub = hub_data(info->nasid); setup_hub_mask(hd, &hub->h_cpus); + info->nasid = cpu_to_node(hd->cpu); /* Make sure it's not already pending when we connect it. */ REMOTE_HUB_CLR_INTR(info->nasid, swlevel); |