qdio_start_irq(9)

✨ NAME ✨

okay bestie, welcome to qdio_start_irq from the Kernel API Manual, section 9. it's giving “tiny but important” energy, honestly 💅

qdio_start_irq — enable interrupt processing for the device 💖

🦋 SYNOPSIS 🦋

int qdio_start_irq (struct ccw_device *cdev );

🎀 ARGUMENTS 🎀

• cdev — the associated ccw_device for the qdio subchannel ✨

💫 DESCRIPTION 💫

okay so the return-code vibe check is lowkey simple:

• 0 — success 🫶
• 1 — irqs not started since new data is available 🌸

no cap, that's the whole description bestie 😭💜

🌈 SEE ALSO 🌈

Kernel file: ./drivers/s390/cio/qdio_main.c — and here's the whole iconic friend group:

• do_siga_output(9)
• qdio_do_eqbs(9)
• qdio_do_sqbs(9)
• qdio_get_ssqd_desc(9)
• qdio_shutdown(9)
• qdio_free(9)
• qdio_allocate(9)
• qdio_establish(9)
• qdio_activate(9)
• handle_inbound(9)
• qdio_add_bufs_to_input_queue(9)
• handle_outbound(9)
• qdio_add_bufs_to_output_queue(9)
• qdio_stop_irq(9)

and that's the page, bestie 💖 this one comes from ./drivers/s390/cio, dated October 2026, and it's the qdio_start_irq(9) manpage. periodt ✨👑