dmfe: check pci_alloc_consistent errors

We need to check the address that pci_alloc_consistent() returns since
it might fail.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/net/tulip/dmfe.c b/drivers/net/tulip/dmfe.c
index 8e46a513a252..c91852f49a48 100644
--- a/drivers/net/tulip/dmfe.c
+++ b/drivers/net/tulip/dmfe.c
@@ -420,9 +420,13 @@ static int __devinit dmfe_init_one (struct pci_dev *pdev,
         /* Allocate Tx/Rx descriptor memory */
         db->desc_pool_ptr = pci_alloc_consistent(pdev, sizeof(struct tx_desc) *
                         DESC_ALL_CNT + 0x20, &db->desc_pool_dma_ptr);
+        if (!db->desc_pool_ptr)
+                goto err_out_res;
 
         db->buf_pool_ptr = pci_alloc_consistent(pdev, TX_BUF_ALLOC *
                         TX_DESC_CNT + 4, &db->buf_pool_dma_ptr);
+        if (!db->buf_pool_ptr)
+                goto err_out_free_desc;
 
         db->first_tx_desc = (struct tx_desc *) db->desc_pool_ptr;
         db->first_tx_desc_dma = db->desc_pool_dma_ptr;
@@ -469,7 +473,7 @@ static int __devinit dmfe_init_one (struct pci_dev *pdev,
 
         err = register_netdev (dev);
         if (err)
-                goto err_out_res;
+                goto err_out_free_buf;
 
         printk(KERN_INFO "%s: Davicom DM%04lx at pci%s, "
                "%s, irq %d.\n",
@@ -483,6 +487,12 @@ static int __devinit dmfe_init_one (struct pci_dev *pdev,
 
         return 0;
 
+err_out_free_buf:
+        pci_free_consistent(pdev, TX_BUF_ALLOC * TX_DESC_CNT + 4,
+                            db->buf_pool_ptr, db->buf_pool_dma_ptr);
+err_out_free_desc:
+        pci_free_consistent(pdev, sizeof(struct tx_desc) * DESC_ALL_CNT + 0x20,
+                            db->desc_pool_ptr, db->desc_pool_dma_ptr);
 err_out_res:
         pci_release_regions(pdev);
 err_out_disable: