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authorAnup Patel <anup.patel@wdc.com>2020-05-18 14:44:39 +0530
committerMarc Zyngier <maz@kernel.org>2020-05-25 10:36:09 +0100
commit2458ed31e9b9ab40d78a452ab2650a0857556e85 (patch)
tree3e538e46bbbf5db86c42660fff20891252275077 /drivers/irqchip
parentcc86432aa8cc5a81f99d79eea2a29099da694df3 (diff)
downloadlinux-2458ed31e9b9ab40d78a452ab2650a0857556e85.tar.gz
irqchip/sifive-plic: Set default irq affinity in plic_irqdomain_map()
For multiple PLIC instances, each PLIC can only target a subset of CPUs which is represented by "lmask" in the "struct plic_priv". Currently, the default irq affinity for each PLIC interrupt is all online CPUs which is illegal value for default irq affinity when we have multiple PLIC instances. To fix this, we now set "lmask" as the default irq affinity in for each interrupt in plic_irqdomain_map(). Fixes: f1ad1133b18f ("irqchip/sifive-plic: Add support for multiple PLICs") Signed-off-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com> Acked-by: Palmer Dabbelt <palmerdabbelt@google.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200518091441.94843-2-anup.patel@wdc.com
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-sifive-plic.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 822e074c0600..9f7f8ce88c00 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -176,9 +176,12 @@ static struct irq_chip plic_chip = {
static int plic_irqdomain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hwirq)
{
+ struct plic_priv *priv = d->host_data;
+
irq_domain_set_info(d, irq, hwirq, &plic_chip, d->host_data,
handle_fasteoi_irq, NULL, NULL);
irq_set_noprobe(irq);
+ irq_set_affinity(irq, &priv->lmask);
return 0;
}