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authorDon Fry <pcnet32@verizon.net>2009-07-31 08:45:29 +0000
committerDavid S. Miller <davem@davemloft.net>2009-08-02 12:23:06 -0700
commit63097b3ad85788a64c75091bff351ecc850761b2 (patch)
treeab194f0b2066db0c2b1267539dd40d182596ed7d /drivers/net
parentdf4e7f72f5156ef16a918da8a575ba90ec27ab77 (diff)
pcnet32: VLB support fixes
VLB support has been broken since at least 2004-2005 period as some changes introduced back then assumed that ->pci_dev is always valid, lets try to fix it: - remove duplicated SET_NETDEV_DEV() call - call SET_NETDEV_DEV() only for PCI devices - check for ->pci_dev validity in pcnet32_open() [ Alternatively we may consider removing VLB support but there would not be much gain in it since an extra driver code needed for VLB support is minimal and quite simple. ] This takes care of the following entry from Dan's list: drivers/net/pcnet32.c +1889 pcnet32_probe1(298) warning: variable derefenced before check 'pdev' Reported-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Acked-by: Don Fry <pcnet32@verizon.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/pcnet32.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c
index b61c97254b3..16964ec73e6 100644
--- a/drivers/net/pcnet32.c
+++ b/drivers/net/pcnet32.c
@@ -1722,7 +1722,9 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
ret = -ENOMEM;
goto err_release_region;
}
- SET_NETDEV_DEV(dev, &pdev->dev);
+
+ if (pdev)
+ SET_NETDEV_DEV(dev, &pdev->dev);
if (pcnet32_debug & NETIF_MSG_PROBE)
printk(KERN_INFO PFX "%s at %#3lx,", chipname, ioaddr);
@@ -1821,7 +1823,6 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
spin_lock_init(&lp->lock);
- SET_NETDEV_DEV(dev, &pdev->dev);
lp->name = chipname;
lp->shared_irq = shared;
lp->tx_ring_size = TX_RING_SIZE; /* default tx ring size */
@@ -2085,6 +2086,7 @@ static void pcnet32_free_ring(struct net_device *dev)
static int pcnet32_open(struct net_device *dev)
{
struct pcnet32_private *lp = netdev_priv(dev);
+ struct pci_dev *pdev = lp->pci_dev;
unsigned long ioaddr = dev->base_addr;
u16 val;
int i;
@@ -2145,9 +2147,9 @@ static int pcnet32_open(struct net_device *dev)
lp->a.write_csr(ioaddr, 124, val);
/* Allied Telesyn AT 2700/2701 FX are 100Mbit only and do not negotiate */
- if (lp->pci_dev->subsystem_vendor == PCI_VENDOR_ID_AT &&
- (lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
- lp->pci_dev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
+ if (pdev && pdev->subsystem_vendor == PCI_VENDOR_ID_AT &&
+ (pdev->subsystem_device == PCI_SUBDEVICE_ID_AT_2700FX ||
+ pdev->subsystem_device == PCI_SUBDEVICE_ID_AT_2701FX)) {
if (lp->options & PCNET32_PORT_ASEL) {
lp->options = PCNET32_PORT_FD | PCNET32_PORT_100;
if (netif_msg_link(lp))