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| author | Samuel Holland <samuel@sholland.org> | 2022-06-30 05:02:41 -0500 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-07-01 15:27:23 +0100 |
| commit | 5873ba559101fa37ad9764e79856f71bf54021aa (patch) | |
| tree | e8e57298f8143343133a078fc0c370c1a8f1fe75 | |
| parent | d60df7fd225af37e31859a9badb0cca73f7aa12d (diff) | |
| download | linux-stable-5873ba559101fa37ad9764e79856f71bf54021aa.tar.gz linux-stable-5873ba559101fa37ad9764e79856f71bf54021aa.tar.bz2 linux-stable-5873ba559101fa37ad9764e79856f71bf54021aa.zip | |
irqchip/sifive-plic: Fix T-HEAD PLIC edge trigger handling
The T-HEAD PLIC ignores additional edges seen while an edge-triggered
interrupt is being handled. Because of this behavior, the driver needs
to complete edge-triggered interrupts in the .irq_ack callback before
handling them, instead of in the .irq_eoi callback afterward. Otherwise,
it could miss some interrupts.
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220630100241.35233-5-samuel@sholland.org
| -rw-r--r-- | drivers/irqchip/irq-sifive-plic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c index 90e44367bee9..b3a36dca7f1b 100644 --- a/drivers/irqchip/irq-sifive-plic.c +++ b/drivers/irqchip/irq-sifive-plic.c @@ -474,7 +474,6 @@ static int __init plic_init(struct device_node *node, IRQCHIP_DECLARE(sifive_plic, "sifive,plic-1.0.0", plic_init); IRQCHIP_DECLARE(riscv_plic0, "riscv,plic0", plic_init); /* for legacy systems */ -IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_init); /* for firmware driver */ static int __init plic_edge_init(struct device_node *node, struct device_node *parent) @@ -483,3 +482,4 @@ static int __init plic_edge_init(struct device_node *node, } IRQCHIP_DECLARE(andestech_nceplic100, "andestech,nceplic100", plic_edge_init); +IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_edge_init); |