[PATCH] soc: fsl/qe: fix Oops on CPM1 (and likely CPM2)

Scott Wood oss at buserror.net
Fri Aug 12 09:29:59 AEST 2016

On Mon, 2016-08-08 at 18:08 +0200, Christophe Leroy wrote:
> Commit 0e6e01ff694ee ("CPM/QE: use genalloc to manage CPM/QE muram")
> has changed the way muram is managed.
> genalloc uses kmalloc(), hence requires the SLAB to be up and running.
> On powerpc 8xx, cpm_reset() is called early during startup.
> cpm_reset() then calls cpm_muram_init() before SLAB is available,
> hence the following Oops.
> cpm_reset() cannot be called during initcalls because the CPM is
> needed for console
> This patch splits cpm_muram_init() in two parts. The first part,
> related to mappings, is kept as cpm_muram_init()
> The second part is named cpm_muram_pool_init() and is called
> the first time cpm_muram_alloc() is used

Why do you need to split it, versus calling the full cpm_muram_init() on


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