pcmcia_request_irq(9)

💖 NAME 💖

okay so this is pcmcia_request_irq(9) from the Kernel API Manual, and it's literally “attempt to request a IRQ for a PCMCIA device” ✨

✨ SYNOPSIS ✨

int pcmcia_request_irq (struct pcmcia_device *p_dev , irq_handler_t
       handler );

🎀 ARGUMENTS 🎀

• p_dev — the associated PCMCIA device, bestie 🫶
• handler — the IRQ handler to register 👑

🦋 DESCRIPTION 🦋

pcmcia_request_irq is a wrapper around request_irq — and the whole point is that it lets the PCMCIA core clean up the registration in pcmcia_disable_device. So tidy. 💅

Drivers are free to use request_irq directly, but then they need to call free_irq themselves, too. Like, no cap: if you go direct, cleanup is your problem, bestie 😭

Also, only IRQF_SHARED capable IRQ handlers are allowed. Periodt. 🔥

🌈 SEE ALSO 🌈

Kernel file: ./drivers/pcmcia/pcmcia_resource.c 👀

go read these too, they're iconic 🧚

• release_io_space(9)
• alloc_io_space(9)
• pcmcia_map_mem_page(9)
• pcmcia_fixup_iowidth(9)
• pcmcia_fixup_vpp(9)
• pcmcia_release_configuration(9)
• pcmcia_release_io(9)
• pcmcia_release_window(9)
• pcmcia_enable_device(9)
• pcmcia_request_io(9)
• pcmcia_setup_isa_irq(9)
• pcmcia_setup_irq(9)
• pcmcia_request_window(9)
• pcmcia_disable_device(9)

that's the whole page, bestie — source/version home is ./drivers/pcmcia, it's dated October 2026, and yes it's still the pcmcia_request_irq(9) page — bye bestie, mwah 💋