[PATCH 6/6] nx-842-platform: if NX842 platform drivers are not modules, don't try to load them

Dan Streetman ddstreet at us.ibm.com
Thu Jul 16 00:33:30 AEST 2015

On Mon, Jul 6, 2015 at 1:07 PM, Nishanth Aravamudan
<nacc at linux.vnet.ibm.com> wrote:
> On 06.07.2015 [16:13:07 +0800], Herbert Xu wrote:
>> On Thu, Jul 02, 2015 at 03:42:26PM -0700, Nishanth Aravamudan wrote:
>> > Based off the CONFIG_SPU_FS_MODULE code, only attempt to load platform
>> > modules if the nx-842 pseries/powernv drivers are built as modules.
>> >
>> > Otherwise, if CONFIG_DEV_NX_COMPRESS=y,
>> > message is emitted at boot:
>> >
>> > nx_compress: no nx842 driver found.
>> >
>> > even though the drivers successfully loads.
>> >
>> > This is because in the =y case, the module_init() calls get converted to
>> > initcalls and the nx842_init() runs before the platform driver
>> > nx842_pseries_init() or nx842_powernv_init() functions, which are what
>> > normally set the static platform driver.
>> >
>> > Signed-off-by: Nishanth Aravamudan <nacc at linux.vnet.ibm.com>
>> > Cc: Dan Streetman <ddstreet at us.ibm.com>
>> > Cc: Herbert Xu <herbert at gondor.apana.org.au>
>> > Cc: "David S. Miller" <davem at davemloft.net>
>> > Cc: linux-crypto at vger.kernel.org
>> > Cc: linuxppc-dev at lists.ozlabs.org
>> Ugh, I think this whole thing is redundant.  The whole point of
>> the crypto API is to allow the coexistence of multiple underlying
>> implementations.
> Sure, that makes sense -- sorry, I was picking this up while Dan was on
> vacation. Will provide a better v2.
>> Please get rid of nx-842-platform.c completely and move the crypto
>> registration into the individual platform drivers.  That is, powernv
>> and pseries should each register their own crypto driver.  They can of
>> course share a common set of crypto code which can live in its own
>> module.  There should be no need for mucking with module reference
>> counts at all.
> Will do, thanks!

Yep, I originally did it this way because I didn't realize crypto
could register different drivers with the same alg name (but different
driver names).  I have some patches already to start doing this but
they weren't ready enough to send before I left for vacation; I'll
finish them up and send them.

> -Nish
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