Re: [PATCH] thunderbolt: Clear hops before overwriting
From: Andreas Noever
Date: Tue Aug 26 2014 - 12:02:45 EST
On Tue, Aug 26, 2014 at 5:54 PM, Greg KH <greg@xxxxxxxxx> wrote:
> On Tue, Aug 26, 2014 at 05:42:21PM +0200, Andreas Noever wrote:
>> Zero hops in tb_path_activate before writing a new path.
>> This fixes the following scenario:
>> - Boot with a coldplugged device
>> - Unplug device
>> - Plug device back in
>> - PCI hotplug fails
>> The hotplug operation fails because our new path matches the (now
>> defunct) path which was setup by the firmware for the coldplugged
>> device. By writing zeros before writing our path configuration we can
>> force thunderbolt to retrain the path.
>> Signed-off-by: Andreas Noever <andreas.noever@xxxxxxxxx>
>> drivers/thunderbolt/path.c | 21 ++++++++++++++++++++-
>> 1 file changed, 20 insertions(+), 1 deletion(-)
> Should this get in for 3.17-final or can it wait for 3.18? I'm thinking
> 3.17, but want to make sure.
I would prefer 3.17.
> greg k-h
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/