scsi: lpfc: Check for hdwq null ptr when cleaning up lpfc_vport structure

JIRA: https://issues.redhat.com/browse/RHEL-103751

commit 6698796
Author: Justin Tee <justin.tee@broadcom.com>
Date:   Wed Jun 18 12:21:28 2025 -0700

    scsi: lpfc: Check for hdwq null ptr when cleaning up lpfc_vport structure

    If a call to lpfc_sli4_read_rev() from lpfc_sli4_hba_setup() fails, the
    resultant cleanup routine lpfc_sli4_vport_delete_fcp_xri_aborted() may
    occur before sli4_hba.hdwqs are allocated.  This may result in a null
    pointer dereference when attempting to take the abts_io_buf_list_lock for
    the first hardware queue.  Fix by adding a null ptr check on
    phba->sli4_hba.hdwq and early return because this situation means there
    must have been an error during port initialization.

    Signed-off-by: Justin Tee <justin.tee@broadcom.com>
    Link: https://lore.kernel.org/r/20250618192138.124116-4-justintee8345@gmail.com
    Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: Paul Ely <paely@redhat.com>

Author: Paul Ely

drivers/scsi/lpfc/lpfc_scsi.c

@@ -390,6 +390,10 @@ lpfc_sli4_vport_delete_fcp_xri_aborted(struct lpfc_vport *vport)
 	if (!(vport->cfg_enable_fc4_type & LPFC_ENABLE_FCP))
 		return;
 
+	/* may be called before queues established if hba_setup fails */
+	if (!phba->sli4_hba.hdwq)
+		return;
+
 	spin_lock_irqsave(&phba->hbalock, iflag);
 	for (idx = 0; idx < phba->cfg_hdw_queue; idx++) {
 		qp = &phba->sli4_hba.hdwq[idx];