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uio: do not use PCI resources before pci_enable_device() 

IRQ and resource[] may not have correct values until
after PCI hotplug setup occurs at pci_enable_device() time.

The semantic match that finds this problem is as follows:

// <smpl>
@@
identifier x;
identifier request ~= "pci_request.*|pci_resource.*";
@@

(
* x->irq
|
* x->resource
|
* request(x, ...)
)
 ...
*pci_enable_device(x)
// </smpl>

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Hans J. Koch <hjk@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kulikov Vasiliy 2010-08-03 19:44:23 +04:00 committed by Greg Kroah-Hartman
parent d79d32440c
commit 1037246cac
1 changed files with 7 additions and 6 deletions
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13
drivers/uio/uio_pci_generic.c
View File

@ -128,12 +128,6 @@ static int __devinit probe(struct pci_dev *pdev,
struct uio_pci_generic_dev *gdev;
int err;
if (!pdev->irq) {
dev_warn(&pdev->dev, "No IRQ assigned to device: "
"no support for interrupts?\n");
return -ENODEV;
}
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "%s: pci_enable_device failed: %d\n",
@ -141,6 +135,13 @@ static int __devinit probe(struct pci_dev *pdev,
return err;
}
if (!pdev->irq) {
dev_warn(&pdev->dev, "No IRQ assigned to device: "
"no support for interrupts?\n");
pci_disable_device(pdev);
return -ENODEV;
}
err = verify_pci_2_3(pdev);
if (err)
goto err_verify;