net/qla3xxx: fix potential memleak in ql_alloc_buffer_queues

When dma_alloc_coherent() fails, we should free qdev->lrg_buf
to prevent potential memleak.

Fixes: 1357bfc ("qla3xxx: Dynamically size the rx buffer queue based on the MTU.")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20231227070227.10527-1-dinghao.liu@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/qlogic/qla3xxx.c

@@ -2591,6 +2591,7 @@ static int ql_alloc_buffer_queues(struct ql3_adapter *qdev)
 
  if (qdev->lrg_buf_q_alloc_virt_addr == NULL) {
  netdev_err(qdev->ndev, "lBufQ failed\n");
+ kfree(qdev->lrg_buf);
  return -ENOMEM;
  }
  qdev->lrg_buf_q_virt_addr = qdev->lrg_buf_q_alloc_virt_addr;
@@ -2615,6 +2616,7 @@ static int ql_alloc_buffer_queues(struct ql3_adapter *qdev)
  qdev->lrg_buf_q_alloc_size,
  qdev->lrg_buf_q_alloc_virt_addr,
  qdev->lrg_buf_q_alloc_phy_addr);
+ kfree(qdev->lrg_buf);
  return -ENOMEM;
  }