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

[Amir Vadai <amirv@mellanox.com>]

On 8/12/2014 2:48 PM, Gavin Shan wrote:
> 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>