diff options
| -rw-r--r-- | drivers/scsi/bnx2fc/bnx2fc_io.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c index 86da3014d15..0c64d184d73 100644 --- a/drivers/scsi/bnx2fc/bnx2fc_io.c +++ b/drivers/scsi/bnx2fc/bnx2fc_io.c @@ -17,7 +17,7 @@ static int bnx2fc_split_bd(struct bnx2fc_cmd *io_req, u64 addr, int sg_len, int bd_index); static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req); -static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); +static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req); static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req); static void bnx2fc_free_mp_resc(struct bnx2fc_cmd *io_req); static void bnx2fc_parse_fcp_rsp(struct bnx2fc_cmd *io_req, @@ -1607,20 +1607,24 @@ static int bnx2fc_map_sg(struct bnx2fc_cmd *io_req) return bd_count; } -static void bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) +static int bnx2fc_build_bd_list_from_sg(struct bnx2fc_cmd *io_req) { struct scsi_cmnd *sc = io_req->sc_cmd; struct fcoe_bd_ctx *bd = io_req->bd_tbl->bd_tbl; int bd_count; - if (scsi_sg_count(sc)) + if (scsi_sg_count(sc)) { bd_count = bnx2fc_map_sg(io_req); - else { + if (bd_count == 0) + return -ENOMEM; + } else { bd_count = 0; bd[0].buf_addr_lo = bd[0].buf_addr_hi = 0; bd[0].buf_len = bd[0].flags = 0; } io_req->bd_tbl->bd_valid = bd_count; + + return 0; } static void bnx2fc_unmap_sg_list(struct bnx2fc_cmd *io_req) @@ -1942,7 +1946,13 @@ int bnx2fc_post_io_req(struct bnx2fc_rport *tgt, xid = io_req->xid; /* Build buffer descriptor list for firmware from sg list */ - bnx2fc_build_bd_list_from_sg(io_req); + if (bnx2fc_build_bd_list_from_sg(io_req)) { + printk(KERN_ERR PFX "BD list creation failed\n"); + spin_lock_bh(&tgt->tgt_lock); + kref_put(&io_req->refcount, bnx2fc_cmd_release); + spin_unlock_bh(&tgt->tgt_lock); + return -EAGAIN; + } task_idx = xid / BNX2FC_TASKS_PER_PAGE; index = xid % BNX2FC_TASKS_PER_PAGE; |