dm_test_abor..._no_dmub_srv(9)

💅 dm_test_abor..._no_dmub_srv(9) — Kernel API Manual ✨

okay so bestie, buckle up, because we're reading a Kernel API Manual page together and honestly? it's kind of a vibe. the star of the show is dm_test_abort_fused_io_no_dmub_srv, and no cap, the whole point of it is "what happens when there's no DMUB service and we try to abort fused IO anyway" 🦋

---

🌸 NAME 🌸

dm_test_abort_fused_io_no_dmub_srv — Test fused IO abort is a safe no-op without DMUB service 💖

like literally, the test is checking that aborting fused IO with no DMUB service hanging around is a safe no-op. nothing crashes, nobody gets hurt, we all go home. periodt. 🎀

---

✨ SYNOPSIS ✨

void dm_test_abort_fused_io_no_dmub_srv (struct kunit *test );

---

🫶 ARGUMENTS 🫶

• test — The KUnit test context. that's it, that's the whole argument, she's lowkey iconic for it 👑

---

🔥 DESCRIPTION 🔥

so here's the tea: abort_fused_io builds an abort command and submits it via dm_execute_dmub_cmd. sounds normal right? except — with no DC DMUB service, that submission fails silently, and the call must not crash. that's the whole assignment. the vibe check is "does it survive with zero drama" and the answer has to be yes 💀✨

bestie this is a test, so the "must not crash" part isn't a suggestion, it's the entire point of the function. don't be out here breaking it 🙈

---

👑 SEE ALSO 👑

Kernel file:

./drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_dmub_test.c

and now, the whole friend group — every single one of these cuties gets a mention, no skipping, we don't leave anyone on read 💜

• dm_test_register_dmub_notify_callback_null_callback(9)
• dm_test_register_dmub_notify_callback_type_out_of_range(9)
• dm_test_register_dmub_notify_callback_valid(9)
• dm_test_register_dmub_notify_callback_offload_false(9)
• dm_test_dmub_aux_setconfig_callback_copies_and_completes(9)
• dm_test_dmub_aux_setconfig_callback_non_aux_no_complete(9)
• dm_test_dmub_aux_setconfig_callback_aux_with_null_dm_notify(9)
• dm_test_dmub_aux_setconfig_callback_set_config_reply(9)
• dm_test_dmub_aux_fused_io_callback_copies_reply_and_completes(9)
• dm_test_dmub_aux_fused_io_callback_max_ddc_line(9)
• dm_test_dmub_aux_fused_io_callback_null_args(9)
• dm_test_get_default_ips_mode_dcn35(9)
• dm_test_get_default_ips_mode_dcn351(9)
• dm_test_get_default_ips_mode_dcn36(9)
• dm_test_get_default_ips_mode_older_than_dcn35(9)
• dm_test_get_default_ips_mode_newer_default(9)
• dm_test_dmub_hw_init_no_dmub_srv(9)
• dm_test_dmub_hw_init_no_fb_info(9)
• dm_test_dmub_hw_init_no_firmware(9)
• dm_test_dmub_hw_init_success_fake_dmub(9)
• dm_test_dmub_hw_init_no_hw_support(9)
• dm_test_dmub_hw_init_bss_data(9)
• dm_test_dmub_hw_init_hw_init_fails(9)
• dm_test_dmub_hw_init_auto_load_timeout(9)
• dm_test_dmub_hw_init_apu_dpia_dcn35(9)
• dm_test_dmub_hw_init_sanity_checks_dcn31(9)
• dm_test_dmub_hw_init_sanity_checks_dcn314(9)
• dm_test_dmub_hw_init_dmcu_abm(9)
• dm_test_dmub_hw_resume_no_dmub_srv(9)
• dm_test_dmub_hw_resume_initialized_dmub(9)
• dm_test_dmub_hw_resume_full_init(9)
• dm_test_dmub_hw_resume_init_check_failed(9)
• dm_test_dmub_hw_resume_auto_load_timeout(9)
• dm_test_dmub_sw_init_unsupported_asic(9)
• dm_test_init_microcode_unsupported_asic(9)
• dm_test_dmub_get_vbios_bounding_box_default_null(9)
• dm_test_execute_dmub_cmd_null_dmub_srv(9)
• dm_test_process_dmub_aux_transfer_sync_engine_acquire(9)
• dm_test_process_dmub_aux_transfer_sync_protocol_error(9)
• dm_test_process_dmub_aux_transfer_sync_copies_data(9)
• dm_test_process_dmub_aux_transfer_sync_zero_length(9)
• dm_test_process_dmub_set_config_sync_unknown_error(9)

---

🌸 ok bye bestie, go read the whole test file, mwah 💖

sign-off time 🎀 this one came out of ./drivers/gpu/drm/amd/display/..., dated October 2026, and that's the whole page for dm_test_abor..._no_dmub_srv(9). you ate that. slay. 💅✨