From: Quinn Tran <qutran@marvell.com>
Date: Tue, 5 Nov 2019 07:06:52 -0800
Subject: scsi: qla2xxx: Fix SRB leak on switch command timeout
Patch-mainline: v5.5-rc1
Git-commit: af2a0c51b1205327f55a7e82e530403ae1d42cbb
References: bsc#1143706 bsc#1082635 bsc#1154526 bsc#1048942

when GPSC/GPDB switch command fails, driver just returns without doing a
proper cleanup. This patch fixes this memory leak by calling sp->free() in
the error path.

Link: https://lore.kernel.org/r/20191105150657.8092-4-hmadhani@marvell.com
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/scsi/qla2xxx/qla_gs.c   |    2 +-
 drivers/scsi/qla2xxx/qla_init.c |   11 +++++------
 drivers/scsi/qla2xxx/qla_mbx.c  |    4 ----
 drivers/scsi/qla2xxx/qla_mid.c  |   11 ++++-------
 drivers/scsi/qla2xxx/qla_os.c   |    7 ++++++-
 5 files changed, 16 insertions(+), 19 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3010,7 +3010,7 @@ static void qla24xx_async_gpsc_sp_done(s
 	fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
 
 	if (res == QLA_FUNCTION_TIMEOUT)
-		return;
+		goto done;
 
 	if (res == (DID_ERROR << 16)) {
 		/* entry status error */
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1153,19 +1153,18 @@ static void qla24xx_async_gpdb_sp_done(s
 	    "Async done-%s res %x, WWPN %8phC mb[1]=%x mb[2]=%x \n",
 	    sp->name, res, fcport->port_name, mb[1], mb[2]);
 
-	if (res == QLA_FUNCTION_TIMEOUT) {
-		dma_pool_free(sp->vha->hw->s_dma_pool, sp->u.iocb_cmd.u.mbx.in,
-			sp->u.iocb_cmd.u.mbx.in_dma);
-		return;
-	}
-
 	fcport->flags &= ~(FCF_ASYNC_SENT | FCF_ASYNC_ACTIVE);
+
+	if (res == QLA_FUNCTION_TIMEOUT)
+		goto done;
+
 	memset(&ea, 0, sizeof(ea));
 	ea.fcport = fcport;
 	ea.sp = sp;
 
 	qla24xx_handle_gpdb_event(vha, &ea);
 
+done:
 	dma_pool_free(ha->s_dma_pool, sp->u.iocb_cmd.u.mbx.in,
 		sp->u.iocb_cmd.u.mbx.in_dma);
 
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -6288,17 +6288,13 @@ int qla24xx_send_mb_cmd(struct scsi_qla_
 	case  QLA_SUCCESS:
 		ql_dbg(ql_dbg_mbx, vha, 0x119d, "%s: %s done.\n",
 		    __func__, sp->name);
-		sp->free(sp);
 		break;
 	default:
 		ql_dbg(ql_dbg_mbx, vha, 0x119e, "%s: %s Failed. %x.\n",
 		    __func__, sp->name, rval);
-		sp->free(sp);
 		break;
 	}
 
-	return rval;
-
 done_free_sp:
 	sp->free(sp);
 done:
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -946,7 +946,7 @@ int qla24xx_control_vp(scsi_qla_host_t *
 
 	sp = qla2x00_get_sp(base_vha, NULL, GFP_KERNEL);
 	if (!sp)
-		goto done;
+		return rval;
 
 	sp->type = SRB_CTRL_VP;
 	sp->name = "ctrl_vp";
@@ -962,7 +962,7 @@ int qla24xx_control_vp(scsi_qla_host_t *
 		ql_dbg(ql_dbg_async, vha, 0xffff,
 		    "%s: %s Failed submission. %x.\n",
 		    __func__, sp->name, rval);
-		goto done_free_sp;
+		goto done;
 	}
 
 	ql_dbg(ql_dbg_vport, vha, 0x113f, "%s hndl %x submitted\n",
@@ -980,16 +980,13 @@ int qla24xx_control_vp(scsi_qla_host_t *
 	case QLA_SUCCESS:
 		ql_dbg(ql_dbg_vport, vha, 0xffff, "%s: %s done.\n",
 		    __func__, sp->name);
-		goto done_free_sp;
+		break;
 	default:
 		ql_dbg(ql_dbg_vport, vha, 0xffff, "%s: %s Failed. %x.\n",
 		    __func__, sp->name, rval);
-		goto done_free_sp;
+		break;
 	}
 done:
-	return rval;
-
-done_free_sp:
 	sp->free(sp);
 	return rval;
 }
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -1002,7 +1002,7 @@ qla2xxx_mqueuecommand(struct Scsi_Host *
 		ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x3078,
 		    "Start scsi failed rval=%d for cmd=%p.\n", rval, cmd);
 		if (rval == QLA_INTERFACE_ERROR)
-			goto qc24_fail_command;
+			goto qc24_free_sp_fail_command;
 		goto qc24_host_busy_free_sp;
 	}
 
@@ -1014,6 +1014,11 @@ qc24_host_busy_free_sp:
 qc24_target_busy:
 	return SCSI_MLQUEUE_TARGET_BUSY;
 
+qc24_free_sp_fail_command:
+	sp->free(sp);
+	CMD_SP(cmd) = NULL;
+	qla2xxx_rel_qpair_sp(sp->qpair, sp);
+
 qc24_fail_command:
 	cmd->scsi_done(cmd);