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>
diff --git a/drivers/uio/uio_pci_generic.c b/drivers/uio/uio_pci_generic.c
index 85c9884..fc22e1e 100644
--- a/drivers/uio/uio_pci_generic.c
+++ b/drivers/uio/uio_pci_generic.c
@@ -128,12 +128,6 @@
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 @@
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;