ca8210_test_int_user_read(9)

💅 ca8210_test_int_user_read (9) ✨

okay so bestie, welcome to the Kernel API Manual page for ca8210_test_int_user_read — yes that's a whole mouthful, we're slaying anyway 🎀

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🌸 NAME 🌸

ca8210_test_int_user_read — literally the function that gets called by a process in userspace when it wants to read a message from the ca8210 drivers 💖

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✨ SYNOPSIS ✨

ssize_t ca8210_test_int_user_read (struct file *filp , char __user *buf
, size_t len , loff_t *offp );

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🦋 ARGUMENTS 🦋

• filp — the file interface, hi bestie 👋
• buf — the buffer where the message gets written to, that's where the tea lands 🍓
• len — length of the message to read — and no, it does not matter, it's ignored 🙈 (iconic honestly)
• offp — the file offset, tracking where we're at 📍

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💜 DESCRIPTION 💜

so here's the vibe check: if the O_NONBLOCK flag was set when the file got opened, then this function is not gonna block — like, it returns immediately if the fifo is empty, no waiting around, no strings attached 💅

otherwise? it will block, meaning it just sits there and waits until new data actually arrives. main character patience. 🧚

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🔥 RETURN 🔥

the number of bytes read — that's it, that's the whole answer ⭐

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👑 SEE ALSO 👑

Kernel file ./drivers/net/ieee802154/ca8210.c, struct cas_control(9), struct ca8210_test(9), struct ca8210_priv(9), struct work_priv_container(9), struct ca8210_platform_data(9), struct fulladdr(9), union macaddr(9), struct secspec(9), link_to_linux_err(9), ca8210_test_int_driver_write(9), ca8210_reset_send(9), ca8210_mlme_reset_worker(9), ca8210_rx_done(9), ca8210_spi_transfer_complete(9), ca8210_spi_transfer(9), ca8210_spi_exchange(9), ca8210_interrupt_handler(9), tdme_setsfr_request_sync(9), tdme_chipinit(9), tdme_channelinit(9), tdme_checkpibattribute(9), tdme_settxpower(9), mcps_data_request(9), mlme_reset_request_sync(9), mlme_set_request_sync(9), hwme_set_request_sync(9), hwme_get_request_sync(9), ca8210_async_xmit_complete(9), ca8210_skb_rx(9), ca8210_net_rx(9), ca8210_skb_tx(9), ca8210_start(9), ca8210_stop(9), ca8210_xmit_async(9), ca8210_get_ed(9), ca8210_set_channel(9), ca8210_set_hw_addr_filt(9), ca8210_set_tx_power(9), ca8210_set_cca_mode(9), ca8210_set_cca_ed_level(9), ca8210_set_csma_params(9), ca8210_set_frame_retries(9), ca8210_test_int_open(9), ca8210_test_check_upstream(9), ca8210_test_int_user_write(9), ca8210_test_int_ioctl(9), ca8210_test_int_poll(9), ca8210_get_platform_data(9), ca8210_config_extern_clk(9), ca8210_register_ext_clock(9), ca8210_unregister_ext_clock(9), ca8210_reset_init(9), ca8210_interrupt_init(9), ca8210_dev_com_init(9), ca8210_dev_com_clear(9), ca8210_hw_setup(9), ca8210_test_interface_init(9), ca8210_test_interface_clear(9), ca8210_remove(9), ca8210_probe(9) 💖

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and that's the whole page bestie, no cap 🫶 this lil masterpiece lives at ./drivers/net/ieee802154 and the version is dated October 2026 — see u in the next manpage, mwah 😭💅🌈