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Date: Tue, 10 Jul 2007 17:05:16 +0100
From: Ralf Baechle <ralf@...ux-mips.org>
To: Andrew Morton <akpm@...ux-foundation.org>,
Jeff Garzik <jeff@...zik.org>,
Alan Cox <alan@...rguk.ukuu.org.uk>, netdev@...r.kernel.org
Subject: [IOC3] Switch to pci refcounting safe APIs
From: Alan Cox <alan@...rguk.ukuu.org.uk>
Convert the IOC3 driver to use ref counting pci interfaces so that we can
obsolete the (usually unsafe) pci_find_{slot/device} interfaces and avoid
future authors writing hotplug-unsafe device drivers.
Signed-off-by: Alan Cox <alan@...hat.com>
Build fixes:
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Index: upstream-linus/drivers/net/ioc3-eth.c
===================================================================
--- upstream-linus.orig/drivers/net/ioc3-eth.c
+++ upstream-linus/drivers/net/ioc3-eth.c
@@ -352,13 +352,12 @@ static u64 nic_find(struct ioc3 *ioc3, i
static int nic_init(struct ioc3 *ioc3)
{
- const char *type;
+ const char *unknown = "unknown";
+ const char *type = unknown;
u8 crc;
u8 serial[6];
int save = 0, i;
- type = "unknown";
-
while (1) {
u64 reg;
reg = nic_find(ioc3, &save);
@@ -392,7 +391,7 @@ static int nic_init(struct ioc3 *ioc3)
}
printk("Found %s NIC", type);
- if (type != "unknown") {
+ if (type != unknown) {
printk (" registration number %02x:%02x:%02x:%02x:%02x:%02x,"
" CRC %02x", serial[0], serial[1], serial[2],
serial[3], serial[4], serial[5], crc);
@@ -1103,20 +1102,28 @@ static int ioc3_close(struct net_device
* MiniDINs; all other subdevices are left swinging in the wind, leave
* them disabled.
*/
-static inline int ioc3_is_menet(struct pci_dev *pdev)
+
+static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot)
{
- struct pci_dev *dev;
+ struct pci_dev *dev = pci_get_slot(pdev->bus, PCI_DEVFN(slot, 0));
+ int ret = 0;
+
+ if (dev) {
+ if (dev->vendor == PCI_VENDOR_ID_SGI &&
+ dev->device == PCI_DEVICE_ID_SGI_IOC3)
+ ret = 1;
+ pci_dev_put(dev);
+ }
- return pdev->bus->parent == NULL
- && (dev = pci_find_slot(pdev->bus->number, PCI_DEVFN(0, 0)))
- && dev->vendor == PCI_VENDOR_ID_SGI
- && dev->device == PCI_DEVICE_ID_SGI_IOC3
- && (dev = pci_find_slot(pdev->bus->number, PCI_DEVFN(1, 0)))
- && dev->vendor == PCI_VENDOR_ID_SGI
- && dev->device == PCI_DEVICE_ID_SGI_IOC3
- && (dev = pci_find_slot(pdev->bus->number, PCI_DEVFN(2, 0)))
- && dev->vendor == PCI_VENDOR_ID_SGI
- && dev->device == PCI_DEVICE_ID_SGI_IOC3;
+ return ret;
+}
+
+static int ioc3_is_menet(struct pci_dev *pdev)
+{
+ return pdev->bus->parent == NULL &&
+ ioc3_adjacent_is_ioc3(pdev, 0) &&
+ ioc3_adjacent_is_ioc3(pdev, 1) &&
+ ioc3_adjacent_is_ioc3(pdev, 2);
}
#ifdef CONFIG_SERIAL_8250
-
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