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Sun, 8 Apr 2018 20:32:16 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Suzuki K Poulose , Marc Zyngier , Sasha Levin Subject: [PATCH AUTOSEL for 4.9 206/293] irqchip/gic-v3: Honor forced affinity setting Thread-Topic: [PATCH AUTOSEL for 4.9 206/293] irqchip/gic-v3: Honor forced affinity setting Thread-Index: AQHTz5lG8Xs9oAKgdEyEQ8Dbwiht4Q== Date: Mon, 9 Apr 2018 00:25:34 +0000 Message-ID: <20180409002239.163177-206-alexander.levin@microsoft.com> References: <20180409002239.163177-1-alexander.levin@microsoft.com> In-Reply-To: <20180409002239.163177-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0870;7:HNj/h0hmgBXWQdckqxi+uROKXtxNjBSjKcXpjbGoVqGc8OMvdrkdpYFxgKXBLKyfrlHwKJMkK1aFTnkLKTOZwGFuTPzhWF5r/vBayjy0kRj3SApUT+5Gunaua/9iiNLJ8UJvkzobmd7tFY5ut0yVn5yCR6ves3kB9Goi5M85GtxqjSLxFRJ9EQKvl7DlYg8tkggdbDxZNrGoFfRH8ZvPMyZyiLcgZDxYvdc/8+7LKnf/fM3932lX0R8G5ipyTrfi;20:k6aXD+e1WDzHRwWVamiPF3X610wioSmHAVFNDPY5+qx5aQ61DqnCdQOqJNioTT/Or2WijCceezsPXrEZsbyeU3hl5eSlcnFYUDe2REz6EQ3hXapd7Rl6FU2tDiZ3TW87+cJ3DSTDV3PabWI5SU7FnVnkHSqKgJMmcxUTfMSmdBE= x-ms-office365-filtering-ht: Tenant X-MS-Office365-Filtering-Correlation-Id: 6a46fdf6-ffbe-40bf-2de7-08d59db1551d x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0870; 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Some drivers, like ARM PMU, rely on it. Cc: Marc Zyngier Reported-by: Mark Rutland Signed-off-by: Suzuki K Poulose Signed-off-by: Marc Zyngier Signed-off-by: Sasha Levin --- drivers/irqchip/irq-gic-v3.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 8c7f02318a6b..0ef240c64c65 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -641,11 +641,16 @@ static void gic_smp_init(void) static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask= _val, bool force) { - unsigned int cpu =3D cpumask_any_and(mask_val, cpu_online_mask); + unsigned int cpu; void __iomem *reg; int enabled; u64 val; =20 + if (force) + cpu =3D cpumask_first(mask_val); + else + cpu =3D cpumask_any_and(mask_val, cpu_online_mask); + if (cpu >=3D nr_cpu_ids) return -EINVAL; =20 --=20 2.15.1