[RFC PATCH v2 05/21] pnp.h: Return -EPROBE_DEFER for disabled IRQ resource in pnp_irq()
From: Sunil V L <sunilvl@ventanamicro.com>
Date: 2023-10-25 20:24:59
Also in:
linux-acpi, linux-pci, linux-riscv, linux-serial, lkml
Subsystem:
pnp support, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
To support deferred PNP driver probe, pnp_irq() must return -EPROBE_DEFER so that the device driver can do deferred probe if the interrupt controller is not probed early. Signed-off-by: Sunil V L <sunilvl@ventanamicro.com> --- include/linux/pnp.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index c2a7cfbca713..21cf833789fb 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h@@ -147,12 +147,18 @@ static inline resource_size_t pnp_mem_len(struct pnp_dev *dev, } -static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar) +static inline int pnp_irq(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar); - if (pnp_resource_valid(res)) + if (pnp_resource_valid(res)) { +#if IS_ENABLED(CONFIG_ARCH_ACPI_DEFERRED_GSI) + if (!pnp_resource_enabled(res)) + return -EPROBE_DEFER; +#endif + return res->start; + } return -1; }
--
2.39.2
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