gsm_control_wait(9)

💅 gsm_control_wait(9) — like, the Kernel API Manual, but make it make sense

okay so bestie, welcome to gsm_control_wait(9) ✨ this is a page from the Kernel API Manual and it's honestly short and sweet — we're waiting on a control message to finish, that's the whole vibe. let me walk you through it 🫶

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🌸 NAME 🌸

gsm_control_wait — wait for a control to finish 💅

like literally just. sit there. until the control is done. periodt.

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✨ SYNOPSIS ✨

int gsm_control_wait (struct gsm_mux *gsm , struct gsm_control *control
);

two args, one int back. no cap, that's it 🔥

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🎀 ARGUMENTS 🎀

• gsm — the GSM mux 🦋 (yes that's the whole description, she's lowkey mysterious)
• control — the control we are waiting on ⏳ like, the specific one. the main character of this function ngl.

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💖 DESCRIPTION 💖

so here's the tea ☕: gsm_control_wait waits for the control to complete or time out. that's the whole job, and she does it well 💅

when it's done, it frees any used resources — cleanup queen, we stan 🧹✨ — and then it returns 0 for success 🙌

but if it doesn't go well? if the remote rejected it, or straight up ignored the request? 😭 then you get an error back instead. rude of the remote honestly, but that's the contract.

so real talk: check that return value. 0 = slay, error = the remote was not giving 💀

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👑 SEE ALSO 👑

okay this section is a whole friend group, so buckle up bestie — all of these live in the kernel file ./drivers/tty/n_gsm.c 📁 and they're all here, every single one, i'm not skipping anybody 🙈

• gsm_fcs_add(9), gsm_fcs_add_block(9), gsm_read_ea(9), gsm_read_ea_val(9), gsm_encode_modem(9), gsm_encode_params(9), gsm_register_devices(9), gsm_unregister_devices(9), gsm_print_packet(9), gsm_stuff_frame(9), gsm_send(9), gsm_dlci_clear_queues(9), gsm_response(9), gsm_command(9), gsm_data_alloc(9), gsm_send_packet(9), gsm_is_flow_ctrl_msg(9), gsm_data_kick(9), __gsm_data_queue(9), gsm_data_queue(9), gsm_dlci_data_output(9), gsm_dlci_data_output_framed(9), gsm_dlci_modem_output(9), gsm_dlci_data_sweep(9), gsm_dlci_data_kick(9), gsm_control_command(9), gsm_control_reply(9), gsm_process_modem(9), gsm_process_negotiation(9), gsm_control_modem(9), gsm_control_negotiation(9), gsm_control_rls(9), gsm_control_message(9), gsm_control_response(9), gsm_control_keep_alive(9), gsm_control_transmit(9), gsm_control_retransmit(9), gsm_control_send(9), gsm_dlci_close(9), gsm_dlci_open(9), gsm_dlci_negotiate(9), gsm_dlci_t1(9), gsm_dlci_begin_open(9), gsm_dlci_set_opening(9), gsm_dlci_set_wait_config(9), gsm_dlci_begin_close(9), gsm_dlci_data(9), gsm_dlci_command(9), gsm_kick_timer(9), gsm_dlci_copy_config_values(9), gsm_dlci_config(9), gsm_dlci_alloc(9), gsm_dlci_free(9), gsm_dlci_release(9), gsm_queue(9), gsm0_receive_state_check_and_fix(9), gsm0_receive(9), gsm1_receive_state_check_and_fix(9), gsm1_receive(9), gsm_error(9), gsm_cleanup_mux(9), gsm_activate_mux(9), gsm_free_mux(9), gsm_free_muxr(9), gsm_alloc_mux(9), gsmld_output(9), gsmld_write_trigger(9), gsmld_write_task(9), gsmld_attach_gsm(9), gsmld_detach_gsm(9), gsmld_flush_buffer(9), gsmld_close(9), gsmld_open(9), gsmld_write_wakeup(9), gsmld_read(9), gsmld_write(9), gsmld_poll(9), gsm_modem_upd_via_data(9), gsm_modem_upd_via_msc(9), gsm_modem_update(9), gsm_wait_modem_change(9)

see? everybody showed up to the party 🎉 iykyk 💜

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and that's the whole page, bestie — short, iconic, no filler 🌈

signed off from ./drivers/tty in October 2026 — gsm_control_wait(9) forever 💜✨🎀