es58x_rx_cmd_ret_u32(9)

✨ es58x_rx_cmd_ret_u32(9) ✨

okay so bestie, welcome to the Kernel API Manual entry for es58x_rx_cmd_ret_u32(9) — literally the function that reads the tea ☕ that the ES58X device is spilling back at you. it's giving "translator for the device's mood ring" 💅

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🌸 NAME 🌸

es58x_rx_cmd_ret_u32 — handles the command return code received from the ES58X device. no cap, that's the whole job 🫶

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🦋 SYNOPSIS 🦋

int es58x_rx_cmd_ret_u32 (struct net_device *netdev , enum
es58x_ret_type cmd_ret_type , enum es58x_ret_u32 rx_cmd_ret_u32 );

like, three args, one int out. simple queen behavior 👑

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🎀 ARGUMENTS 🎀

• netdev — the CAN network device. the main character of this whole situation 💖
• cmd_ret_type — the type of the command that triggered the return code. iykyk, context matters ✨
• rx_cmd_ret_u32 — the error code as returned by the ES58X device. this is the raw lore straight from the hardware 📨

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💜 DESCRIPTION 💜

so what does it actually do? it handles the 32 bits command return code. that's it, that's the vibe 🌈

and the return value? it will eventually be used by the es58x_handle_urb_cmd function, which is the one that takes proper actions in case of critical issues such and memory errors or bad CRC values. so like, this function is the messenger, and es58x_handle_urb_cmd is the one who actually does something about it 😭🔥

not me being the middle-man in a whole error-handling pipeline — but fr fr, keeping the details straight here matters, because critical issues are, well, critical 💀

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⭐ RETURN ⭐

• zero on success 🎉
• errno when any error occurs 🙈

that's it. binary vibes. slay.

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🔥 SEE ALSO 🔥

kernel file ./drivers/net/can/usb/etas_es58x/es58x_core.c 📁

and the whole friend group, in order:

es58x_calculate_crc(9), es58x_get_crc(9), es58x_set_crc(9), es58x_check_crc(9), es58x_timestamp_to_ns(9), es58x_set_skb_timestamp(9), es58x_rx_timestamp(9), es58x_set_realtime_diff_ns(9), es58x_is_can_state_active(9), es58x_is_echo_skb_threshold_reached(9), es58x_can_free_echo_skb_tail(9), es58x_can_get_echo_skb_recovery(9), es58x_can_get_echo_skb(9), es58x_can_reset_echo_fifo(9), es58x_flush_pending_tx_msg(9), es58x_tx_ack_msg(9), es58x_rx_can_msg(9), es58x_rx_err_msg(9), es58x_cmd_ret_desc(9), es58x_rx_cmd_ret_u8(9), es58x_increment_rx_errors(9), es58x_handle_urb_cmd(9), es58x_check_rx_urb(9), es58x_copy_to_cmd_buf(9), es58x_split_urb_try_recovery(9), es58x_handle_incomplete_cmd(9), es58x_split_urb(9), es58x_read_bulk_callback(9), es58x_write_bulk_callback(9), es58x_alloc_urb(9), es58x_get_tx_urb(9), es58x_submit_urb(9), es58x_send_msg(9), es58x_alloc_rx_urbs(9), es58x_free_urbs(9), es58x_open(9), es58x_stop(9), es58x_xmit_commit(9), es58x_xmit_more(9), es58x_start_xmit(9), es58x_set_mode(9), es58x_init_priv(9), es58x_init_netdev(9), es58x_free_netdevs(9), es58x_init_es58x_dev(9), es58x_probe(9), es58x_disconnect(9)

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anyway bestie, that's the whole page 🧚 this one lives in ./drivers/net/can/usb/etas_es58x and it's dated October 2026, so like — go read the source, stay hydrated, and remember: check your return codes 💖✨🎀🦋💅