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rt2x00: Allow dynamic addition of PCI/USB IDs.

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Both USB and PCI drivers allow a system administrator to dynamically add
USB/PCI IDs to the device table that a driver supports via the
/sys/bus/{usb,pci,pci_express}/drivers/<driver-name>/new_id files.

However, for the rt2x00 drivers using this method currently crashes the
system with a NULL pointer failure.

This is due to the set-up of rt2x00 where the probe functions require a
rt2x00_ops structure in the driver_info field of the probed device. As
this field is empty for the dynamically added devices this fails for
these devices.

Fix this by introducing driver-specific probe wrappers that do nothing
but calling the bus-specific probe functions with the rt2x00_ops structure
as an argument, rather than depending on the driver_info field.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gertjan van Wingerde 2011-04-18 15:32:13 +02:00 • committed by John W. Linville
parent ce2919c9ff
commit e01ae27f8c
11 changed files with 404 additions and 369 deletions
Download patch file Download diff file Expand all files Collapse all files

11
drivers/net/wireless/rt2x00/rt2400pci.c
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@ -1802,10 +1802,11 @@ static const struct rt2x00_ops rt2400pci_ops = {
* RT2400pci module information.
*/
static DEFINE_PCI_DEVICE_TABLE(rt2400pci_device_table) = {
{ PCI_DEVICE(0x1814, 0x0101), PCI_DEVICE_DATA(&rt2400pci_ops) },
{ PCI_DEVICE(0x1814, 0x0101) },
{ 0, }
};
MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("Ralink RT2400 PCI & PCMCIA Wireless LAN driver.");
@ -1813,10 +1814,16 @@ MODULE_SUPPORTED_DEVICE("Ralink RT2460 PCI & PCMCIA chipset based cards");
MODULE_DEVICE_TABLE(pci, rt2400pci_device_table);
MODULE_LICENSE("GPL");
static int rt2400pci_probe(struct pci_dev *pci_dev,
const struct pci_device_id *id)
{
return rt2x00pci_probe(pci_dev, &rt2400pci_ops);
}
static struct pci_driver rt2400pci_driver = {
.name = KBUILD_MODNAME,
.id_table = rt2400pci_device_table,
.probe = rt2x00pci_probe,
.probe = rt2400pci_probe,
.remove = __devexit_p(rt2x00pci_remove),
.suspend = rt2x00pci_suspend,
.resume = rt2x00pci_resume,