staging: ft1000: fix skb, netdev, memory leaks

ft1000_copy_up_pkt() doesn't free skb on errors.
init_ft1000_card() doesn't free netdev with free_netdev() but with kfree().
init_ft1000_card() doesn't check request_region()'s return value
and doesn't free region on error.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
index a6ba84c..eed7e94 100644 (file)
--- a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
+++ b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_hw.c
@@ -1686,6 +1686,7 @@ int ft1000_copy_up_pkt(struct net_device *dev)
                          tempword);
                ft1000_flush_fifo(dev, DSP_PKTPHCKSUM_INFO);
                info->stats.rx_errors++;
+               kfree_skb(skb);
                return FAILURE;
        }
        //subtract the number of bytes read already
@@ -1711,6 +1712,7 @@ int ft1000_copy_up_pkt(struct net_device *dev)
                        *pbuffer++ = (u8) (tempword >> 8);
                        *pbuffer++ = (u8) tempword;
                        if (ft1000_chkcard(dev) == FALSE) {
+                               kfree_skb(skb);
                                return FAILURE;
                        }
                }
@@ -2236,15 +2238,17 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
 
        if (request_irq(dev->irq, ft1000_interrupt, IRQF_SHARED, dev->name, dev)) {
                printk(KERN_ERR "ft1000: Could not request_irq\n");
-               kfree(dev);
-               return (NULL);
+               goto err_dev;
        }
 
-       request_region(dev->base_addr, 256, dev->name);
+       if (request_region(dev->base_addr, 256, dev->name) == NULL) {
+               printk(KERN_ERR "ft1000: Could not request_region\n");
+               goto err_irq;
+       }
 
        if (register_netdev(dev) != 0) {
                DEBUG(0, "ft1000: Could not register netdev");
-               return NULL;
+               goto err_reg;
        }
 
        info->AsicID = ft1000_read_reg(dev, FT1000_REG_ASIC_ID);
@@ -2252,19 +2256,13 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
                DEBUG(0, "ft1000_hw: ELECTRABUZZ ASIC\n");
                if (request_firmware(&fw_entry, "ft1000.img", fdev) != 0) {
                        printk(KERN_INFO "ft1000: Could not open ft1000.img\n");
-                       unregister_netdev(dev);
-                       free_irq(dev->irq, dev);
-                       kfree(dev);
-                       return NULL;
+                       goto err_unreg;
                }
        } else {
                DEBUG(0, "ft1000_hw: MAGNEMITE ASIC\n");
                if (request_firmware(&fw_entry, "ft2000.img", fdev) != 0) {
                        printk(KERN_INFO "ft1000: Could not open ft2000.img\n");
-                       unregister_netdev(dev);
-                       free_irq(dev->irq, dev);
-                       kfree(dev);
-                       return NULL;
+                       goto err_unreg;
                }
        }
 
@@ -2279,6 +2277,16 @@ struct net_device *init_ft1000_card(unsigned short irq, int port,
                   dev->dev_addr[1], dev->dev_addr[2], dev->dev_addr[3],
                   dev->dev_addr[4], dev->dev_addr[5]);
        return dev;
+
+err_unreg:
+       unregister_netdev(dev);
+err_reg:
+       release_region(dev->base_addr, 256);
+err_irq:
+       free_irq(dev->irq, dev);
+err_dev:
+       free_netdev(dev);
+       return NULL;
 }
 
 EXPORT_SYMBOL(init_ft1000_card);