cxgb3: do not use PCI resources before pci_enable_device()
Kulikov Vasiliy [Tue, 3 Aug 2010 05:43:11 +0000 (05:43 +0000)]
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>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/cxgb3/cxgb3_main.c

index 066fd5b..ad19585 100644 (file)
@@ -3198,17 +3198,17 @@ static int __devinit init_one(struct pci_dev *pdev,
                }
        }
 
-       err = pci_request_regions(pdev, DRV_NAME);
+       err = pci_enable_device(pdev);
        if (err) {
-               /* Just info, some other driver may have claimed the device. */
-               dev_info(&pdev->dev, "cannot obtain PCI resources\n");
-               return err;
+               dev_err(&pdev->dev, "cannot enable PCI device\n");
+               goto out;
        }
 
-       err = pci_enable_device(pdev);
+       err = pci_request_regions(pdev, DRV_NAME);
        if (err) {
-               dev_err(&pdev->dev, "cannot enable PCI device\n");
-               goto out_release_regions;
+               /* Just info, some other driver may have claimed the device. */
+               dev_info(&pdev->dev, "cannot obtain PCI resources\n");
+               goto out_disable_device;
        }
 
        if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
@@ -3217,11 +3217,11 @@ static int __devinit init_one(struct pci_dev *pdev,
                if (err) {
                        dev_err(&pdev->dev, "unable to obtain 64-bit DMA for "
                               "coherent allocations\n");
-                       goto out_disable_device;
+                       goto out_release_regions;
                }
        } else if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) != 0) {
                dev_err(&pdev->dev, "no usable DMA configuration\n");
-               goto out_disable_device;
+               goto out_release_regions;
        }
 
        pci_set_master(pdev);
@@ -3234,7 +3234,7 @@ static int __devinit init_one(struct pci_dev *pdev,
        adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
        if (!adapter) {
                err = -ENOMEM;
-               goto out_disable_device;
+               goto out_release_regions;
        }
 
        adapter->nofail_skb =
@@ -3370,11 +3370,12 @@ out_free_dev:
 out_free_adapter:
        kfree(adapter);
 
-out_disable_device:
-       pci_disable_device(pdev);
 out_release_regions:
        pci_release_regions(pdev);
+out_disable_device:
+       pci_disable_device(pdev);
        pci_set_drvdata(pdev, NULL);
+out:
        return err;
 }