dwc3_alloc_one_event_buffer(9)

💅 dwc3_alloc_one_event_buffer(9) — like, the Kernel API Manual page, bestie ✨

okay so this is a page straight outta the Kernel API Manual and it's about dwc3_alloc_one_event_buffer — yes that's a whole mouthful, iykyk 🫶 it's a handy lil kernel function and honestly it's giving "small but crucial" main character energy.

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✨ NAME ✨

dwc3_alloc_one_event_buffer — literally what it says on the tin: it allocates one event buffer structure 🎀

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🌸 SYNOPSIS 🌸

struct dwc3_event_buffer * dwc3_alloc_one_event_buffer (struct dwc3 *dwc
, unsigned int length );

like… that's the whole vibe. two args, one return, slay 💅

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🦋 ARGUMENTS 🦋

• dwc — pointer to our controller context structure. it's our controller's context, no cap 👑
• length — the size of the event buffer. the bigger the length, the bigger the buffer, obviously 🍓

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💖 DESCRIPTION 💖

so basically: on success it returns a pointer to the allocated event buffer structure. and if things don't go the way we wanted? it returns ERR_PTR(errno) 😭 like, an error pointer carrying the errno. that's it. that's the whole function. iconic behavior honestly ✨

fr fr bestie, remember it can hand you back an error pointer, so vibe check that return value before you dereference it 💀

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🧚 SEE ALSO 🧚

kernel file ./drivers/usb/dwc3/core.c, plus the whole friend group:

• dwc3_get_dr_mode(9)
• dwc3_core_soft_reset(9)
• dwc3_ref_clk_period(9)
• dwc3_free_one_event_buffer(9)
• dwc3_free_event_buffers(9)
• dwc3_alloc_event_buffers(9)
• dwc3_event_buffers_setup(9)
• dwc3_phy_setup(9)
• dwc3_core_init(9)

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aaaand that's a wrap 💜 this lil adventure lives under ./drivers/usb/dwc3, stamped October 2026, and it's dwc3_alloc_one_event_buffer(9) — go forth and allocate responsibly, bestie 🌈⭐