On 06/06/12 00:38, Jan Kiszka wrote:
> On 2012-05-25 16:02, Jan Kiszka wrote:
>> According to Alexey, the T310 does not properly support INTx masking as
>> it fails to keep the PCI_STATUS_INTERRUPT bit updated once the interrupt
>> is masked. Mark this adapter as broken so that pci_intx_mask_supported
>> won't report it as compatible.
>>
>> Reported-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
>> Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxx>
>> ---
>>
>> Alexey, please test if this catches your case correctly.
>
> Alexey? Ping for testing.
Sorry, was in vacation and then a bit busy.
Yes, that works, thanks. It just a device ID is wrong, should be 0x0030 rather than 0x0010 in your patch - may be 0x10 is broken too, I do not know, mine is 0x30 :)
Here:
>> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x0010,
>> + quirk_broken_intx_masking);
>
> Jan
>
>>
>> drivers/pci/pci.c | 3 +++
>> drivers/pci/quirks.c | 12 ++++++++++++
>> include/linux/pci.h | 2 ++
>> 3 files changed, 17 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
>> index 8f16900..3a1aeb5 100644
>> --- a/drivers/pci/pci.c
>> +++ b/drivers/pci/pci.c
>> @@ -2876,6 +2876,9 @@ bool pci_intx_mask_supported(struct pci_dev *dev)
>> bool mask_supported = false;
>> u16 orig, new;
>>
>> + if (dev->broken_intx_masking)
>> + return false;
>> +
>> pci_cfg_access_lock(dev);
>>
>> pci_read_config_word(dev, PCI_COMMAND, &orig);
>> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
>> index 2a75216..151e174 100644
>> --- a/drivers/pci/quirks.c
>> +++ b/drivers/pci/quirks.c
>> @@ -2929,6 +2929,18 @@ static void __devinit disable_igfx_irq(struct pci_dev *dev)
>> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
>> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
>>
>> +/*
>> + * Some devices may pass our check in pci_intx_mask_supported if
>> + * PCI_COMMAND_INTX_DISABLE works though they actually do not properly
>> + * support this feature.
>> + */
>> +static void __devinit quirk_broken_intx_masking(struct pci_dev *dev)
>> +{
>> + dev->broken_intx_masking = 1;
>> +}
>> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CHELSIO, 0x0010,
>> + quirk_broken_intx_masking);
>> +
>> static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
>> struct pci_fixup *end)
>> {
>> diff --git a/include/linux/pci.h b/include/linux/pci.h
>> index 17b7b5b..c7cfd73 100644
>> --- a/include/linux/pci.h
>> +++ b/include/linux/pci.h
>> @@ -324,6 +324,8 @@ struct pci_dev {
>> unsigned int is_hotplug_bridge:1;
>> unsigned int __aer_firmware_first_valid:1;
>> unsigned int __aer_firmware_first:1;
>> + unsigned int broken_intx_masking:1; /* device's INTx masking
>> + support is not working */
>> pci_dev_flags_t dev_flags;
>> atomic_t enable_cnt; /* pci_enable_device has been called */
>>
>
--
Alexey
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