Re: [PATCH v3] PCI: Mark broken INTx masking for Mellanox devices

[Gavin Shan <gwshan@linux.vnet.ibm.com>]

On Tue, Aug 12, 2014 at 02:59:49PM +0300, Amir Vadai wrote:
>On 8/12/2014 2:48 PM, Gavin Shan wrote:

Cc Bjorn so that he can pick it up if possible.

>> The VFIO driver is routing LSI interrupts by capturing, masking,
>> and then delivering. When passing though Mellanox adapters from
>> host to guest, interrupt storm was reported from host and guest.
>> That's because we can't mask the LSI interrupt with help of PCI
>> command register.
>> 
>>  # lspci | grep Mellanox
>>  0001:05:00.0 Ethernet controller: Mellanox Technologies MT27500 \
>>               Family [ConnectX-3]
>>  0005:01:00.0 Ethernet controller: Mellanox Technologies MT26448 \
>>               [ConnectX EN 10GigE, PCIe 2.0 5GT/s] (rev b0)
>> 
>> It's confirmed by Amir Vadai that all Mellanox devices have same
>> problem. The patch marks broken INTx masking for all Mellanox
>> adapters.
>> 
>> Cc: Amir Vadai <amirv@mellanox.com>
>> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
>> ---
>> v3: Mark broken INTx masking for all Mellanox adapters
>> ---
>>  drivers/pci/quirks.c | 2 ++
>>  1 file changed, 2 insertions(+)
>> 
>
>Acked-By: Amir Vadai <amirv@mellanox.com>
>

Thanks,
Gavin

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