uart_unregister_driver(9)

💅 uart_unregister_driver — the kernel API manual, but make it make sense

okay so real talk, bestie, we're deep in the Kernel API Manual today and the star of the show is uart_unregister_driver(9). yes it's a mouthful, no you don't have to say it out loud at parties. it's literally the "breakup" function for serial drivers and honestly? iconic. let's get into it ✨

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🌸 NAME 🌸

uart_unregister_driver — remove a driver from the uart core layer

like, the driver is leaving the group chat. that's the whole vibe. 🫶

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🎀 SYNOPSIS 🎀

void uart_unregister_driver (struct uart_driver *drv );

returns void, takes one pointer, zero drama. she's efficient. 💅

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🧚 ARGUMENTS 🧚

• drv — low level driver structure. that's your driver's whole personality in struct form, bestie. this is the thing getting un-registered. 🦋

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🔥 DESCRIPTION 🔥

okay so the actual job here: remove all references to a driver from the core driver. all of them. every last one. no crumbs left. 🔥

but here's the part where you have to be a responsible main character: the low level driver must have already removed all its ports via the uart_remove_one_port function — that's assuming it registered them with uart_add_one_port in the first place. in other words, drv->port needs to be NULL before you call this. that's the vibe check. if you skip this step, you're not slaying, you're just causing problems for future-you. 😭

ngl this is the kind of sequencing thing that will absolutely bite you if you get it backwards. ports out first, then the driver. periodt. 🎀

Locking: none. Interrupts: enabled. so like, no special locking ceremony required, and interrupts are chillin' enabled the whole time. noted, respected, memorized. ✨

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👑 SEE ALSO 👑

all the siblings, cousins, and distant relatives in the family tree — go say hi 💖

• Kernel file ./drivers/tty/serial/serial_core.c
• uart_write_wakeup(9)
• uart_update_timeout(9)
• uart_get_baud_rate(9)
• uart_get_divisor(9)
• uart_get_lsr_info(9)
• uart_console_write(9)
• uart_parse_earlycon(9)
• uart_parse_options(9)
• uart_set_options(9)
• uart_change_pm(9)
• uart_register_driver(9)
• serial_core_add_one_port(9)
• serial_core_remove_one_port(9)
• uart_match_port(9)
• uart_handle_dcd_change(9)
• uart_handle_cts_change(9)
• uart_insert_char(9)
• uart_try_toggle_sysrq(9)
• uart_get_rs485_mode(9)

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and that's the tea, bestie 🍓 this lil gem lives over in ./drivers/tty/serial and it's dated October 2026 — so mark your calendars, screenshot it, send it to the group chat, and go un-register those drivers responsibly. mwah 💋💜