cdns3_gadge...lloc_request(9)

💅 cdns3_gadge...lloc_request(9)

okay so bestie, welcome to the Kernel API Manual 💖 this one's page is cdns3_gadge...lloc_request(9) (yes the title got truncated by the manpage formatter, she's shy, it's fine, it's cdns3_gadget_ep_alloc_request fr fr) and it's literally just about handing you a fresh USB request struct. iconic. let's go 🎀

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✨ NAME ✨

cdns3_gadget_ep_alloc_request — Allocates request 🫶

✨ SYNOPSIS ✨

struct usb_request * cdns3_gadget_ep_alloc_request (struct usb_ep *ep ,
gfp_t gfp_flags );

like, it takes a pointer to an endpoint and your gfp flags, and it gives you back a struct usb_request *. no cap. 🌸

✨ ARGUMENTS ✨

• ep — the endpoint object associated with the request 🦋
• gfp_flags — the gfp flags 💫

that's it. two args. we love a low-maintenance function signature.

✨ DESCRIPTION ✨

Returns the allocated request address 💅 and if the allocation goes sideways? you get NULL. that's the whole vibe check. no request for you, bestie 😭

ngl: NULL here means allocation error, so like… always check before you go dereferencing, queen. main character energy means checking your return values. periodt. 👑

✨ SEE ALSO ✨

the kernel file lives at ./drivers/usb/cdns3/cdns3-gadget.c — that's the source, go read her, she ate 🔥

and here's the whole friend group, all of them (9) sections, all of them iconic in their own way:

• cdns3_clear_register_bit(9)
• cdns3_set_register_bit(9)
• cdns3_ep_addr_to_index(9)
• cdns3_next_request(9)
• cdns3_next_align_buf(9)
• cdns3_next_priv_request(9)
• cdns3_select_ep(9)
• cdns3_get_tdl(9)
• cdns3_allocate_trb_pool(9)
• cdns3_ep_stall_flush(9)
• cdns3_hw_reset_eps_config(9)
• cdns3_ep_inc_trb(9)
• cdns3_ep_inc_enq(9)
• cdns3_ep_inc_deq(9)
• cdns3_allow_enable_l1(9)
• cdns3_start_all_request(9)
• cdns3_wa2_descmiss_copy_data(9)
• cdns3_wa2_descmissing_packet(9)
• cdns3_gadget_giveback(9)
• cdns3_ep_run_transfer(9)
• cdns3_trb_handled(9)
• cdns3_check_ep_interrupt_proceed(9)
• cdns3_check_usb_interrupt_proceed(9)
• cdns3_device_irq_handler(9)
• cdns3_device_thread_irq_handler(9)
• cdns3_ep_onchip_buffer_reserve(9)
• cdns3_ep_config(9)
• cdns3_gadget_ep_free_request(9)
• cdns3_gadget_ep_enable(9)
• cdns3_gadget_ep_disable(9)
• __cdns3_gadget_ep_queue(9)
• cdns3_gadget_ep_dequeue(9)
• __cdns3_gadget_ep_set_halt(9)
• __cdns3_gadget_ep_clear_halt(9)
• cdns3_gadget_ep_set_halt(9)
• cdns3_gadget_get_frame(9)
• cdns3_gadget_udc_start(9)
• cdns3_gadget_udc_stop(9)
• cdns3_gadget_check_config(9)
• cdns3_init_eps(9)
• cdns3_gadget_init(9)

like… that's forty-one whole friends. she's connected. iykyk 🌈

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okay that's the page!! 🧚 mwah 💜

shoutout to the source dir ./drivers/usb/cdns3, from October 2026, and the header/footer tag cdns3_gadge...lloc_request(9) — that's a wrap bestie, go allocate something safely and check for NULL on your way out 😭🫶⭐