lpfc_release_scsi_buf_s4(9)

okay bestie, welcome to the lpfc_release_scsi_buf_s4(9) page from the Kernel API Manual — yes, the manual name is right there, and we’re about to make this kernel function make sense 💅✨

🎀 NAME 🎀

lpfc_release_scsi_buf_s4 — Return a scsi buffer back to hba scsi buf list. That’s the whole vibe: it’s the “put it back where it belongs” routine 🫶

✨ SYNOPSIS ✨

       void lpfc_release_scsi_buf_s4 (struct lpfc_hba *phba , struct
       lpfc_io_buf *psb );

🌸 ARGUMENTS 🌸

• phba — The Hba for which this call is being executed. Like, the HBA in question, periodt.
• psb — The scsi buffer which is being released. This is the buffer getting sent back home 🏠

🦋 DESCRIPTION 🦋

This routine releases the psb scsi buffer by adding it to the tail of the hdwq io_buf_list list. So it’s literally return-to-sender energy: the buffer goes to the back of the line, no cutting 🎀

For SLI4, XRI's are tied to the scsi buffer and cannot be reused for at least RA_TOV amount of time if it was aborted. That caveat is important, bestie — don’t act like that buffer is instantly free just because it got released 😭

🔥 SEE ALSO 🔥

• Kernel file: ./drivers/scsi/lpfc/lpfc_scsi.c
• lpfc_sli4_set_rsp_sgl_last(9)
• lpfc_rampdown_queue_depth(9)
• lpfc_ramp_down_queue_handler(9)
• lpfc_scsi_dev_block(9)
• lpfc_new_scsi_buf_s3(9)
• lpfc_sli4_vport_delete_fcp_xri_aborted(9)
• lpfc_sli4_io_xri_aborted(9)
• lpfc_get_scsi_buf_s3(9)
• lpfc_get_scsi_buf_s4(9)
• lpfc_get_scsi_buf(9)
• lpfc_release_scsi_buf_s3(9)
• lpfc_release_scsi_buf(9)
• lpfc_fcpcmd_to_iocb(9)
• lpfc_scsi_prep_dma_buf_s3(9)
• lpfc_bg_err_inject(9)
• lpfc_sc_to_bg_opcodes(9)
• lpfc_bg_err_opcodes(9)
• lpfc_bg_setup_bpl(9)
• lpfc_bg_setup_bpl_prot(9)
• lpfc_bg_setup_sgl(9)
• lpfc_bg_setup_sgl_prot(9)
• lpfc_prot_group_type(9)
• lpfc_bg_scsi_adjust_dl(9)
• lpfc_bg_scsi_prep_dma_buf_s3(9)
• lpfc_scsi_prep_dma_buf_s4(9)
• lpfc_bg_scsi_prep_dma_buf_s4(9)
• lpfc_scsi_prep_dma_buf(9)
• lpfc_bg_scsi_prep_dma_buf(9)
• lpfc_scsi_prep_cmnd_buf(9)
• lpfc_send_scsi_error_event(9)
• lpfc_scsi_unprep_dma_buf(9)
• lpfc_unblock_requests(9)
• lpfc_block_requests(9)
• lpfc_update_cmf_cmpl(9)
• lpfc_update_cmf_cmd(9)
• lpfc_handle_fcp_err(9)
• lpfc_fcp_io_cmd_wqe_cmpl(9)
• lpfc_scsi_cmd_iocb_cmpl(9)
• lpfc_scsi_prep_cmnd_buf_s3(9)
• lpfc_scsi_prep_cmnd_buf_s4(9)
• lpfc_scsi_prep_cmnd(9)
• lpfc_scsi_prep_task_mgmt_cmd_s3(9)
• lpfc_scsi_prep_task_mgmt_cmd_s4(9)
• lpfc_scsi_api_table_setup(9)
• lpfc_tskmgmt_def_cmpl(9)
• lpfc_check_pci_resettable(9)
• lpfc_info(9)
• lpfc_poll_rearm_timer(9)
• lpfc_poll_start_timer(9)
• lpfc_poll_timeout(9)
• lpfc_queuecommand(9)
• lpfc_abort_handler(9)
• lpfc_check_fcp_rsp(9)
• lpfc_send_taskmgmt(9)
• lpfc_chk_tgt_mapped(9)
• lpfc_reset_flush_io_context(9)
• lpfc_device_reset_handler(9)
• lpfc_target_reset_handler(9)
• lpfc_host_reset_handler(9)
• lpfc_sdev_init(9)
• lpfc_sdev_configure(9)
• lpfc_sdev_destroy(9)
• lpfc_create_device_data(9)
• lpfc_delete_device_data(9)
• __lpfc_get_device_data(9)
• lpfc_find_next_oas_lun(9)
• lpfc_enable_oas_lun(9)
• lpfc_disable_oas_lun(9)

💖 Signing off from ./drivers/scsi/lpfc, October 2026, on the lpfc_release_scsi_buf_s4(9) page — mwah! 🎀✨