On Tue, Aug 3, 2010 at 5:43 PM, Kulikov Vasiliy <segooon@xxxxxxxxx> wrote:
> 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@xxxxxxxxx>
Good catch.
Acked-by: Gertjan van Wingerde <gwingerde@xxxxxxxxx>
> ---
> drivers/net/wireless/rt2x00/rt2x00pci.c | 21 ++++++++++-----------
> 1 files changed, 10 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c
> index 19b262e..63c2cc4 100644
> --- a/drivers/net/wireless/rt2x00/rt2x00pci.c
> +++ b/drivers/net/wireless/rt2x00/rt2x00pci.c
> @@ -240,16 +240,16 @@ int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
> struct rt2x00_dev *rt2x00dev;
> int retval;
>
> - retval = pci_request_regions(pci_dev, pci_name(pci_dev));
> + retval = pci_enable_device(pci_dev);
> if (retval) {
> - ERROR_PROBE("PCI request regions failed.\n");
> + ERROR_PROBE("Enable device failed.\n");
> return retval;
> }
>
> - retval = pci_enable_device(pci_dev);
> + retval = pci_request_regions(pci_dev, pci_name(pci_dev));
> if (retval) {
> - ERROR_PROBE("Enable device failed.\n");
> - goto exit_release_regions;
> + ERROR_PROBE("PCI request regions failed.\n");
> + goto exit_disable_device;
> }
>
> pci_set_master(pci_dev);
> @@ -260,14 +260,14 @@ int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
> if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
> ERROR_PROBE("PCI DMA not supported.\n");
> retval = -EIO;
> - goto exit_disable_device;
> + goto exit_release_regions;
> }
>
> hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
> if (!hw) {
> ERROR_PROBE("Failed to allocate hardware.\n");
> retval = -ENOMEM;
> - goto exit_disable_device;
> + goto exit_release_regions;
> }
>
> pci_set_drvdata(pci_dev, hw);
> @@ -300,13 +300,12 @@ exit_free_reg:
> exit_free_device:
> ieee80211_free_hw(hw);
>
> -exit_disable_device:
> - if (retval != -EBUSY)
> - pci_disable_device(pci_dev);
> -
> exit_release_regions:
> pci_release_regions(pci_dev);
>
> +exit_disable_device:
> + pci_disable_device(pci_dev);
> +
> pci_set_drvdata(pci_dev, NULL);
>
> return retval;
> --
> 1.7.0.4
>
>
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