scsi: qla4xxx: Fix missing DMA mapping error in qla4xxx_alloc_pdu()

[ Upstream commit 00f452a1b084efbe8dcb60a29860527944a002a1 ]

dma_map_XXX() can fail and should be tested for errors with
dma_mapping_error().

Fixes: b3a271a94d00 ("[SCSI] qla4xxx: support iscsiadm session mgmt")
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Link: https://lore.kernel.org/r/20250618071742.21822-2-fourier.thomas@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 05ae9b1157096685cb6400aff33fcc16bedf4e13..f02d8bbea3e511cb77fc0927c2279119ab7abe91 100644 (file)
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -3425,6 +3425,8 @@ static int qla4xxx_alloc_pdu(struct iscsi_task *task, uint8_t opcode)
                task_data->data_dma = dma_map_single(&ha->pdev->dev, task->data,
                                                     task->data_count,
                                                     DMA_TO_DEVICE);
+               if (dma_mapping_error(&ha->pdev->dev, task_data->data_dma))
+                       return -ENOMEM;
        }
 
        DEBUG2(ql4_printk(KERN_INFO, ha, "%s: MaxRecvLen %u, iscsi hrd %d\n",