megasas_free...crash_buffer(9)

💖 megasas_free_host_crash_buffer — a.k.a. the megasas_free...crash_buffer(9) moment 💖

okay so bestie, welcome to the Kernel API Manual (that's the manual name, we're folding it in right here at the top, you're welcome ✨). Today's main character is megasas_free_host_crash_buffer, and she is literally the one who cleans up after the firmware's little trauma-dump era 🫶

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🌸 NAME 🌸

megasas_free_host_crash_buffer — Host buffers for Crash dump collection from Firmware 💅

ngl the name is doing the absolute most (there are literally three dots in the page header version, we don't talk about it), but the vibe is: free the host-side buffers that were holding firmware crash dump data. Cleanup queen behaviour 👑

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✨ SYNOPSIS ✨

void megasas_free_host_crash_buffer (struct megasas_instance *instance
);

so she returns void — no return value, no "did it work", she just does it and leaves. very main character of her 💀

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🎀 ARGUMENTS 🎀

• instance — Controller's soft instance 🦋 (yes, that's the actual description, it's giving "short and mysterious". It's the software-side instance struct for the controller, iykyk.)

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🌈 SEE ALSO 🌈

okay this list is LONG, like, genuinely iconic-length, so buckle up buttercup — here's the whole friend group, no cap, not a single one skipped 🧚:

• megasas_adp_reset_wait_for_ready(9)
• megasas_check_same_4gb_region(9)
• megasas_enable_intr_fusion(9)
• megasas_disable_intr_fusion(9)
• megasas_get_cmd_fusion(9)
• megasas_return_cmd_fusion(9)
• megasas_write_64bit_req_desc(9)
• megasas_fire_cmd_fusion(9)
• megasas_fusion_update_can_queue(9)
• megasas_free_cmds_fusion(9)
• megasas_create_sg_sense_fusion(9)
• megasas_alloc_cmds_fusion(9)
• wait_and_poll(9)
• megasas_ioc_init_fusion(9)
• megasas_sync_pd_seq_num(9)
• megasas_allocate_raid_maps(9)
• megasas_configure_queue_sizes(9)
• megasas_free_ioc_init_cmd(9)
• megasas_init_adapter_fusion(9)
• megasas_fault_detect_work(9)
• map_cmd_status(9)
• megasas_is_prp_possible(9)
• megasas_make_prp_nvme(9)
• megasas_make_sgl_fusion(9)
• megasas_make_sgl(9)
• megasas_set_pd_lba(9)
• megasas_stream_detect(9)
• megasas_set_raidflag_cpu_affinity(9)
• megasas_build_ldio_fusion(9)
• megasas_build_ld_nonrw_fusion(9)
• megasas_build_syspd_fusion(9)
• megasas_build_io_fusion(9)
• megasas_build_and_issue_cmd_fusion(9)
• megasas_complete_r1_command(9)
• access_irq_context(9)
• release_irq_context(9)
• complete_cmd_fusion(9)
• megasas_enable_irq_poll(9)
• megasas_sync_irqs(9)
• megasas_irqpoll(9)
• megasas_complete_cmd_dpc_fusion(9)
• megasas_isr_fusion(9)
• build_mpt_mfi_pass_thru(9)
• build_mpt_cmd(9)
• megasas_issue_dcmd_fusion(9)
• megasas_release_fusion(9)
• megasas_read_fw_status_reg_fusion(9)
• megasas_alloc_host_crash_buffer(9)
• megasas_adp_reset_fusion(9)
• megasas_check_reset_fusion(9)
• megasas_trigger_snap_dump(9)
• megasas_tm_response_code(9)
• megasas_issue_tm(9)

bestie you're gonna want to look at megasas_alloc_host_crash_buffer(9) too — that's the one who made these buffers, this page is the one who frees them. it's giving "we don't talk anymore" but make it alloc/free 🔥

and the kernel file where all this lives:

./drivers/scsi/megaraid/megaraid_sas_fusion.c

go read it, she ate 💅👑

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💀 real talk though: this page is literally just the free. If you free something that wasn't allocated, that's not a slay, that's a you-problem. The manpage doesn't spell out edge cases, so don't go inventing them, okurrr 🙈

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signed, sealed, delivered with love from ./drivers/scsi/megaraid 🎀 — this was the October 2026 edition of megasas_free...crash_buffer(9), manual name Kernel API Manual, and yes the footer literally has the same name as the header. consistent queen 💜✨