scsi: be2iscsi: Fix a theoretical leak in beiscsi_create_eqs()

[ Upstream commit 38b2db564d9ab7797192ef15d7aade30633ceeae ]

The be_fill_queue() function can only fail when "eq_vaddress" is NULL and
since it's non-NULL here that means the function call can't fail.  But
imagine if it could, then in that situation we would want to store the
"paddr" so that dma memory can be released.

Link: https://lore.kernel.org/r/20200928091300.GD377727@mwanda
Fixes: bfead3b2cb46 ("[SCSI] be2iscsi: Adding msix and mcc_rings V3")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 9b81cfbbc5c532d7e2a164805ed40efbdccb7ff9..239e04c03cf9050886884be525780ce1be405b2a 100644 (file)
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -3020,6 +3020,7 @@ static int beiscsi_create_eqs(struct beiscsi_hba *phba,
                        goto create_eq_error;
                }
 
+               mem->dma = paddr;
                mem->va = eq_vaddress;
                ret = be_fill_queue(eq, phba->params.num_eq_entries,
                                    sizeof(struct be_eq_entry), eq_vaddress);
@@ -3029,7 +3030,6 @@ static int beiscsi_create_eqs(struct beiscsi_hba *phba,
                        goto create_eq_error;
                }
 
-               mem->dma = paddr;
                ret = beiscsi_cmd_eq_create(&phba->ctrl, eq,
                                            BEISCSI_EQ_DELAY_DEF);
                if (ret) {
@@ -3086,6 +3086,7 @@ static int beiscsi_create_cqs(struct beiscsi_hba *phba,
                        goto create_cq_error;
                }
 
+               mem->dma = paddr;
                ret = be_fill_queue(cq, phba->params.num_cq_entries,
                                    sizeof(struct sol_cqe), cq_vaddress);
                if (ret) {
@@ -3095,7 +3096,6 @@ static int beiscsi_create_cqs(struct beiscsi_hba *phba,
                        goto create_cq_error;
                }
 
-               mem->dma = paddr;
                ret = beiscsi_cmd_cq_create(&phba->ctrl, cq, eq, false,
                                            false, 0);
                if (ret) {