On Fri, 2015-02-27 at 17:16 +0100, Geert Uytterhoeven wrote:
> Commit 740c7f31c094703c ("sh_eth: Ensure DMA engines are stopped before
> freeing buffers") added a call to sh_eth_reset() to the
> sh_eth_set_ringparam() and sh_eth_close() paths.
>
> However, setting the software reset bit(s) in the EDMR register resets
> the MAC Address Registers to zero. Hence after kexec, the new kernel
> doesn't detect a valid MAC address and assigns a random MAC address,
> breaking DHCP.
[...]
Sorry about that. This would also affect removing and reloading the
driver as a module, but currently I always have it built in and don't
use kexec.
Ben.
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