On Tue, Aug 3, 2010 at 6:14 PM, Gertjan van Wingerde
<gwingerde@xxxxxxxxx> wrote:
> 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>
Acked-by: Ivo van Doorn <IvDoorn@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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