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irqchip/ls-scfg-msi: Fix MSI affinity handling

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The ls-scfs-msi driver is not dealing with the effective affinity
as it should. Let's fix that, and make it clear that the effective
affinity is restricted to a single CPU. Also prevent the driver from
messing with the internals of the affinity setting infrastructure.

Reported-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Cc: Sumit Garg <sumit.garg@linaro.org>
Link: https://lkml.kernel.org/r/20180622095254.5906-3-marc.zyngier@arm.com
This commit is contained in:
Marc Zyngier 2018-06-22 10:52:49 +01:00 committed by Thomas Gleixner
parent 72a8edc2d9
commit 893fbfff97
1 changed files with 7 additions and 3 deletions
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10
drivers/irqchip/irq-ls-scfg-msi.c
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@ -93,8 +93,12 @@ static void ls_scfg_msi_compose_msg(struct irq_data *data, struct msi_msg *msg)
msg->address_lo = lower_32_bits(msi_data->msiir_addr);
msg->data = data->hwirq;
if (msi_affinity_flag)
msg->data |= cpumask_first(data->common->affinity);
if (msi_affinity_flag) {
const struct cpumask *mask;
mask = irq_data_get_effective_affinity_mask(data);
msg->data |= cpumask_first(mask);
}
iommu_dma_map_msi_msg(data->irq, msg);
}
@ -121,7 +125,7 @@ static int ls_scfg_msi_set_affinity(struct irq_data *irq_data,
return -EINVAL;
}
cpumask_copy(irq_data->common->affinity, mask);
irq_data_update_effective_affinity(irq_data, cpumask_of(cpu));
return IRQ_SET_MASK_OK;
}