dwc2_release_channel(9)

💅 dwc2_release_channel(9) — the Kernel API Manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual, and it's about dwc2_release_channel — yes the whole function, the whole vibe, we're getting into it ✨

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🌸 NAME 🌸

dwc2_release_channel — releases a host channel for use by other transfers 🫶

like literally, you hand the channel back so somebody else can use it. sharing is caring, no cap 💖

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✨ SYNOPSIS ✨

void dwc2_release_channel (struct dwc2_hsotg *hsotg , struct
dwc2_host_chan *chan , struct dwc2_qtd *qtd , enum dwc2_halt_status
halt_status );

it returns void, so don't go looking for a return value, there isn't one, periodt 💅

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🦋 ARGUMENTS 🦋

• hsotg — the HCD state structure. yes bestie, the whole state lives here 👑
• chan — the host channel to release. this is the actual thing you're freeing up 🌈
• qtd — the QTD associated with the host channel. heads up though: this QTD may be freed if the transfer is complete or an error has occurred 😭 so like, don't be weird about it afterwards
• halt_status — the reason the channel is being released. and this status literally determines the actions taken by this function, so pick it with intention fr fr ⭐

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🔥 DESCRIPTION 🔥

so beyond the whole releasing-a-channel thing, it also attempts to select and queue more transactions — because at least one host channel is available now 🎉 it's giving "one leaves, another one enters" main character energy 💀

ngl that's the entire description. short, sweet, iconic. ate and left no crumbs 🍓

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🧚 SEE ALSO 🧚

• Kernel file ./drivers/usb/dwc2/hcd_intr.c — dwc2_update_urb_state(9), dwc2_update_isoc_urb_state(9) 👀

go read those next, iykyk 💜

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and that's the page!! brought to you by ./drivers/usb/dwc2 in October 2026, still serving dwc2_release_channel(9) realness — mwah, love u, go free those channels 💖✨🎀