wait_and_poll(9)

💖 wait_and_poll(9) 💖

okay so bestie, this one comes straight from the Kernel API Manual, and it’s giving “polling command but make it MegaRAID fusion core.” We’re keeping every detail, no cap. 🦋

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🌸 NAME 🌸

wait_and_poll — Issues a polling command

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✨ SYNOPSIS ✨

Look at this signature, she’s iconic:

int wait_and_poll (struct megasas_instance *instance , struct
       megasas_cmd *cmd , int seconds );

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🎀 ARGUMENTS 🎀

• instance — Adapter soft state. That’s the adapter’s soft state, periodt.
• cmd — Command packet to be issued. The packet that’s gonna get sent out.
• seconds — Maximum poll time. The longest polling window, bestie.

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🦋 DESCRIPTION 🦋

For polling, MFI requires the cmd_status to be set to 0xFF before posting. That’s the whole vibe: set it before posting, fr fr.

MFI is not flexible on this: cmd_status goes to 0xFF before posting when you’re polling. 💅

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💜 SEE ALSO 💜

Kernel file: ./drivers/scsi/megaraid/megaraid_sas_fusion.c

And the whole friend group shows up here, no cap:

• 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)
• 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_free_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)

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mwah 💋 — source/version: ./drivers/scsi/megaraid; date: October 2026. wait_and_poll(9) out! 🫶✨