Re: [PATCH 0/3] net: mv643xx_eth: various small fixes for v3.12

[Ezequiel Garcia]

On Wed, Oct 02, 2013 at 12:57:19PM +0200, Sebastian Hesselbarth wrote:
> This patch set comprises some one-liners to fix issues with repeated
> loading and unloading of a modular mv643xx_eth driver.
> 
> First two patches take care of the periodic port statistic timer, that
> updates statistics by reading port registers using add_timer/mod_timer.
> 
> Patch 1 moves timer re-schedule from mib_counters_update to the timer
> callback. As mib_counters_update is also called from non-timer context,
> this ensures the timer is reactivated from timer context only.
> 
> Patch 2 moves initial timer schedule from _probe() time to right before
> the port is actually started as the corresponding del_timer_sync is at
> _stop() time. This fixes a regression, where unloading the driver from a
> non-started eth device can cause the timer to access deallocated mem.
> 
> Patch 3 adds an assignment of the ports device_node to the corresponding
> self-created platform_device. This is required to allow fixups based on
> the device_node's compatible string later. Actually, it is also a potential
> regression because we already check compatible string for Kirkwood, but
> does not (yet) rely on the fixup.
> 
> All patches are based on v3.12-rc3 and have been tested on Kirkwood-based
> Seagate Dockstar.
> 
> Patches 1 and 2 can also possibly queued up for -stable.
> 
> Sebastian Hesselbarth (3):
>   net: mv643xx_eth: update statistics timer from timer context only
>   net: mv643xx_eth: fix orphaned statistics timer crash
>   net: mv643xx_eth: fix missing device_node for port devices
> 
>  drivers/net/ethernet/marvell/mv643xx_eth.c |    7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> ---
> Cc: David Miller <davem@xxxxxxxxxxxxx>
> Cc: Lennert Buytenhek <buytenh@xxxxxxxxxxxxxx>
> Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
> Cc: netdev@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx

Sorry for missing this series, somehow my filters failed to catch it.

Anyway, I would expect these patches to have my Reported-by, but I'm
glad to see you've solved all the issues.

I see David has already applied them all, but I'll re-run my tests to
check there aren't any more issues if I can find some time next week.

Thanks for taking care of it!
-- 
Ezequiel GarcÃa, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com
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