ccw_device_clear(9)

💅 ccw_device_clear(9) — the Kernel API Manual era

okay so bestie, welcome to ccw_device_clear(9) from the Kernel API Manual ✨ this one's a lil shortie but she's important, so let's get into it 🎀

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🌸 NAME 🌸

ccw_device_clear — terminate I/O request processing 💅 literally the "ok we're DONE here" of I/O requests

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✨ SYNOPSIS ✨

int ccw_device_clear (struct ccw_device *cdev , unsigned long intparm );

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🦋 ARGUMENTS 🦋

• cdev — the target ccw device, aka the main character of this whole operation 👑
• intparm — the interruption parameter that gets returned upon conclusion of csch 🫶 like a lil callback note to your future self

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💖 DESCRIPTION 💖

so what does she do? ccw_device_clear calls csch on cdev's subchannel. that's it, that's the vibe ✨ no cap, lowkey iconic in its simplicity.

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🔥 RETURN 🔥

• 0 — on success, slay 💅
• -ENODEV — on device not operational 😭
• -EINVAL — on invalid device state 💀

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🌈 CONTEXT 🌈

bestie listen — interrupts disabled, ccw device lock held. this is not a drill, the vibes require it 🙈

fr fr, respect the context or you're gonna have a bad time 😭

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🎀 SEE ALSO 🎀

Kernel file ./drivers/s390/cio/device_ops.c

and the whole friend group 🫶:

• ccw_device_set_options_mask(9), ccw_device_set_options(9), ccw_device_clear_options(9)
• ccw_device_is_pathgroup(9), ccw_device_is_multipath(9)
• ccw_device_start_timeout_key(9), ccw_device_start_key(9), ccw_device_start(9), ccw_device_start_timeout(9)
• ccw_device_halt(9), ccw_device_resume(9)
• ccw_device_get_ciw(9), ccw_device_get_path_mask(9), ccw_device_get_chp_desc(9), ccw_device_get_util_str(9), ccw_device_get_id(9)
• ccw_device_tm_start_timeout_key(9), ccw_device_tm_start_key(9), ccw_device_tm_start(9), ccw_device_tm_start_timeout(9)
• ccw_device_get_mdc(9), ccw_device_tm_intrg(9), ccw_device_get_schid(9), ccw_device_pnso(9)
• ccw_device_get_cssid(9), ccw_device_get_iid(9), ccw_device_get_chpid(9), ccw_device_get_chid(9)

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okay that's the whole page, ily, go forth and clear those I/O requests responsibly 💜 this came to you from ./drivers/s390/cio, dated October 2026, and she's called ccw_device_clear(9) — periodt 🦋✨