scsi: fnic: Test for memory allocation failure and return error code

Fix kernel test robot warning.  Test for memory allocation failure, and
free memory for queues allocated in a multiqueue and non-multiqueue
scenario.  Return appropriate error code.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/r/202412312347.FE4ZgEoM-lkp@intel.com/
Reported-by: Julia Lawall <julia.lawall@inria.fr>
Closes: https://lore.kernel.org/r/202412312347.FE4ZgEoM-lkp@intel.com/
Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Reviewed-by: Gian Carlo Boffa <gcboffa@cisco.com>
Reviewed-by: Arun Easi <aeasi@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
Link: https://lore.kernel.org/r/20250110091924.17729-1-kartilak@cisco.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index 9ed42d5819d5e3e41c23d4c9202bb7306d3bb529..f8fe67bebf3ee5ab0d0db0e7e6634120a602acb6 100644 (file)
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -582,6 +582,14 @@ static void fnic_scsi_init(struct fnic *fnic)
        host->transportt = fnic_fc_transport;
 }
 
+static void fnic_free_ioreq_tables_mq(struct fnic *fnic)
+{
+       int hwq;
+
+       for (hwq = 0; hwq < fnic->wq_copy_count; hwq++)
+               kfree(fnic->sw_copy_wq[hwq].io_req_table);
+}
+
 static int fnic_scsi_drv_init(struct fnic *fnic)
 {
        struct Scsi_Host *host = fnic->host;
@@ -614,6 +622,11 @@ static int fnic_scsi_drv_init(struct fnic *fnic)
                fnic->sw_copy_wq[hwq].io_req_table =
                        kzalloc((fnic->sw_copy_wq[hwq].ioreq_table_size + 1) *
                                        sizeof(struct fnic_io_req *), GFP_KERNEL);
+
+               if (!fnic->sw_copy_wq[hwq].io_req_table) {
+                       fnic_free_ioreq_tables_mq(fnic);
+                       return -ENOMEM;
+               }
        }
 
        dev_info(&fnic->pdev->dev, "fnic copy wqs: %d, Q0 ioreq table size: %d\n",
@@ -1060,6 +1073,7 @@ static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 err_out_free_stats_debugfs:
        fnic_stats_debugfs_remove(fnic);
+       fnic_free_ioreq_tables_mq(fnic);
        scsi_remove_host(fnic->host);
 err_out_scsi_drv_init:
        fnic_free_intr(fnic);