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[Bug 1386490] Re: HP ProLiant m400 nic doesn't work after trusty
The git link in comment #17 is stale because it references a branch
name, which is often re-used.
is a permanent link to the same thing.
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HP ProLiant m400 nic doesn't work after trusty
Status in debian-installer package in Ubuntu:
Status in linux package in Ubuntu:
Status in debian-installer source package in Utopic:
Status in linux source package in Utopic:
Status in debian-installer source package in Vivid:
Status in linux source package in Vivid:
Starting in 3.15, arm64 began defaulting to non-coherent dma_ops:
Author: Ritesh Harjani <ritesh.harjani@xxxxxxxxx>
Date: Wed Apr 23 06:29:46 2014 +0100
arm64: Make default dma_ops to be noncoherent
Firmware (dtb in the case of the m400) is responsible for telling the
kernel when a device requires coherent dma_ops. However, as of utopic,
this property is not being inherited by downstream devices.
Specifically, the xgene-pcie device is marked as coherent, but the
devices behind it (mellanox card) still get initialized with non-
This results in the mlx4 driver bailing out with the following messages:
[ 18.703635] mlx4_core 0000:01:00.0: command 0x23 timed out (go bit not cleared)
[ 18.710911] mlx4_core 0000:01:00.0: Failed to initialize queue pair table, aborting
There's an upstream discussion on the topic here:
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