[Scst-svn] [master] qla2x00t-32gbit: Prevent command send on chip reset

[Gleb C. <lna...@ya...>]

Commit: aabf1ce
GitHub URL: https://github.com/SCST-project/scst/commit/aabf1cedc3618ef12e7fd5e71063ceba1c9e6c91
Author: Gleb Chesnokov
Date: 2024-05-03T12:50:49+03:00
Log Message:
-----------
qla2x00t-32gbit: Prevent command send on chip reset

Currently IOCBs are allowed to push through while chip reset could be in
progress. During chip reset the outstanding_cmds array is cleared
twice. Once when any command on this array is returned as failed and
secondly when the array is initialize to zero. If a command is inserted on
to the array between these intervals, then the command will be lost.  Check
for chip reset before sending IOCB.

Cc: st...@vg...
Signed-off-by: Quinn Tran <qu...@ma...>
Signed-off-by: Nilesh Javali <nj...@ma...>
Link: https://lore.kernel.org/r/202...@ma...
Reviewed-by: Himanshu Madhani <him...@or...>
Signed-off-by: Martin K. Petersen <mar...@or...>
[ commit 4895009c4bb7 upstream ]

Modified Paths:
--------------
 qla2x00t-32gbit/qla_init.c |  8 +++-
 qla2x00t-32gbit/qla_iocb.c | 33 ++++++++++++++-
 2 files changed, 37 insertions(+), 4 deletions(-)

===================================================================
diff --git a/qla2x00t-32gbit/qla_init.c b/qla2x00t-32gbit/qla_init.c
index 68d9d22..d44fa5d 100644
--- a/qla2x00t-32gbit/qla_init.c
+++ b/qla2x00t-32gbit/qla_init.c
@@ -1193,8 +1193,12 @@ int qla24xx_async_gnl(struct scsi_qla_host *vha, fc_port_t *fcport)
 	return rval;
 
 done_free_sp:
-	/* ref: INIT */
-	kref_put(&sp->cmd_kref, qla2x00_sp_release);
+	/*
+	 * use qla24xx_async_gnl_sp_done to purge all pending gnl request.
+	 * kref_put is call behind the scene.
+	 */
+	sp->u.iocb_cmd.u.mbx.in_mb[0] = MBS_COMMAND_ERROR;
+	qla24xx_async_gnl_sp_done(sp, QLA_COMMAND_ERROR);
 	fcport->flags &= ~(FCF_ASYNC_SENT);
 done:
 	fcport->flags &= ~(FCF_ASYNC_ACTIVE);
diff --git a/qla2x00t-32gbit/qla_iocb.c b/qla2x00t-32gbit/qla_iocb.c
index e045f39..45ba8d5 100644
--- a/qla2x00t-32gbit/qla_iocb.c
+++ b/qla2x00t-32gbit/qla_iocb.c
@@ -2603,6 +2603,33 @@ void
 qla2x00_sp_release(struct kref *kref)
 {
 	struct srb *sp = container_of(kref, struct srb, cmd_kref);
+	struct scsi_qla_host *vha = sp->vha;
+
+	switch (sp->type) {
+	case SRB_CT_PTHRU_CMD:
+		/* GPSC & GFPNID use fcport->ct_desc.ct_sns for both req & rsp */
+		if (sp->u.iocb_cmd.u.ctarg.req &&
+			(!sp->fcport ||
+			 sp->u.iocb_cmd.u.ctarg.req != sp->fcport->ct_desc.ct_sns)) {
+			dma_free_coherent(&vha->hw->pdev->dev,
+			    sp->u.iocb_cmd.u.ctarg.req_allocated_size,
+			    sp->u.iocb_cmd.u.ctarg.req,
+			    sp->u.iocb_cmd.u.ctarg.req_dma);
+			sp->u.iocb_cmd.u.ctarg.req = NULL;
+		}
+		if (sp->u.iocb_cmd.u.ctarg.rsp &&
+			(!sp->fcport ||
+			 sp->u.iocb_cmd.u.ctarg.rsp != sp->fcport->ct_desc.ct_sns)) {
+			dma_free_coherent(&vha->hw->pdev->dev,
+			    sp->u.iocb_cmd.u.ctarg.rsp_allocated_size,
+			    sp->u.iocb_cmd.u.ctarg.rsp,
+			    sp->u.iocb_cmd.u.ctarg.rsp_dma);
+			sp->u.iocb_cmd.u.ctarg.rsp = NULL;
+		}
+		break;
+	default:
+		break;
+	}
 
 	sp->free(sp);
 }
@@ -2708,7 +2735,7 @@ qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
 	 */
 	sp = qla2x00_get_sp(vha, fcport, GFP_KERNEL);
 	if (!sp) {
-		kfree(fcport);
+		qla2x00_free_fcport(fcport);
 		ql_log(ql_log_info, vha, 0x70e6,
 		 "SRB allocation failed\n");
 		return -ENOMEM;
@@ -2763,6 +2790,7 @@ qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
 	if (rval != QLA_SUCCESS) {
 		/* ref: INIT */
 		kref_put(&sp->cmd_kref, qla2x00_sp_release);
+		qla2x00_free_fcport(fcport);
 		return QLA_FUNCTION_FAILED;
 	}
 
@@ -2772,6 +2800,7 @@ qla24xx_els_dcmd_iocb(scsi_qla_host_t *vha, int els_opcode,
 	    fcport->d_id.b.area, fcport->d_id.b.al_pa);
 
 	wait_for_completion(&elsio->u.els_logo.comp);
+	qla2x00_free_fcport(fcport);
 
 	/* ref: INIT */
 	kref_put(&sp->cmd_kref, qla2x00_sp_release);
@@ -3935,7 +3964,7 @@ qla2x00_start_sp(srb_t *sp)
 		return -EAGAIN;
 	}
 
-	pkt = __qla2x00_alloc_iocbs(sp->qpair, sp);
+	pkt = qla2x00_alloc_iocbs_ready(sp->qpair, sp);
 	if (!pkt) {
 		rval = -EAGAIN;
 		ql_log(ql_log_warn, vha, 0x700c,