RE: [PATCH] mlx4_en: fix transmit of packages when blue frame is enabled

Hello, Yevgeny.

We use a MT26448 (lspci -v output bellow) on a POWER7. Any other
information, tests or debug patches you want me to try, just tell me.

I expected this was really not the proper fix, but thought it would be
better to send it than just guess. Any clues what the problem might be?
Perhaps, we would have to disable blue frame for this particular device?

Regards,
Cascardo.

---
lspci output
0006:01:00.0 Ethernet controller: Mellanox Technologies MT26448 [ConnectX EN 10GigE, PCIe 2.0 5GT/s] (rev b0)
---
lspci -v output
0006:01:00.0 0200: 15b3:6750 (rev b0)
        Subsystem: 1014:0416
        Flags: bus master, fast devsel, latency 0, IRQ 31
        Memory at 3da47be00000 (64-bit, non-prefetchable) [size=1M]
        Memory at 3da47c000000 (64-bit, prefetchable) [size=32M]
        Expansion ROM at 3da47bf00000 [disabled] [size=1M]
        Capabilities: [40] Power Management version 3
        Capabilities: [48] Vital Product Data
        Capabilities: [9c] MSI-X: Enable+ Count=128 Masked-
        Capabilities: [60] Express Endpoint, MSI 00
        Capabilities: [100] Alternative Routing-ID Interpretation (ARI)
        Capabilities: [148] Device Serial Number 00-02-c9-03-00-0f-50-be
        Kernel driver in use: mlx4_core
        Kernel modules: mlx4_en, mlx4_core
---

Cascardo,

Can you also send me the output of ethtool -i?
It seems that there is a problem with write combining on Power processors, we will check this issue.

Yevgeny