es58x_tx_ack_msg(9)

💖 es58x_tx_ack_msg(9) 💖

okay so bestie, this is the es58x_tx_ack_msg(9) page from the Kernel API Manual, and it's giving “small function, important ack energy.” We're keeping all the facts, just making it cute enough to read in the group chat. ✨

🎀 NAME 🎀

es58x_tx_ack_msg — Handle acknowledgment messages. Like, the function name literally tells you its whole personality: it handles acknowledgment messages. periodt 💅

✨ SYNOPSIS ✨

int es58x_tx_ack_msg (struct net_device *netdev , u16 tx_free_entries ,
       enum es58x_ret_u32 rx_cmd_ret_u32 );

💅 ARGUMENTS 💅

• netdev — CAN network device. This is the device bestie in question. 🚗
• tx_free_entries — Number of free entries in the device transmit FIFO. Yep, exactly that. 📦
• rx_cmd_ret_u32 — error code as returned by the ES58X device. Keep it exactly as-is, no renaming. 🫶

🌸 DESCRIPTION 🌸

Here's the tea: ES58X sends an acknowledgment message after a transmission request is done. That's the whole reason this function exists. 🎀

It's mandatory for the ES581.4, but it's optional (and deactivated in this driver) for the ES58X_FD family. So, like, different device families have different rules — iconic but also slightly extra. 🌈

Under normal circumstances, this function should never throw an error message. That's the calm, no-drama goal. 😌

🫶 RETURN 🫶

zero on success, errno when any error occurs. That's it, that's the return vibe. ✅

🦋 SEE ALSO 🦋

• Kernel file ./drivers/net/can/usb/etas_es58x/es58x_core.c
• 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_rx_can_msg(9)
• es58x_rx_err_msg(9), es58x_cmd_ret_desc(9), es58x_rx_cmd_ret_u8(9), es58x_rx_cmd_ret_u32(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)

Cute little sign-off: source/version is ./drivers/net/can/usb/etas_es58x, and the date on this footer vibe is October 2026. Bye bestie, go handle those acknowledgment messages responsibly 💋✨