On Mon, Sep 09, 2019 at 05:21:55PM +1000, Herbert Xu wrote:
> On Fri, Sep 06, 2019 at 11:18:19AM +0000, Horia Geanta wrote:
> > On 9/4/2019 5:35 AM, Andrey Smirnov wrote:
> > > In order to access IP block's registers we need to enable appropriate
> > > clocks first, otherwise we are risking hanging the CPU.
> > >
> > > The problem becomes very apparent when trying to use CAAM driver built
> > > as a kernel module. In that case caam_probe() gets called after
> > > clk_disable_unused() which means all of the necessary clocks are
> > > guaranteed to be disabled.
> > >
> > > Coincidentally, this change also fixes iomap leak introduced by early
> > > return (instead of "goto iounmap_ctrl") in commit
> > > 41fc54afae70 ("crypto: caam - simplfy clock initialization")
> > >
> > > Tested on ZII i.MX6Q+ RDU2
> > >
> > > Fixes: 176435ad2ac7 ("crypto: caam - defer probing until QMan is available")
> > > Fixes: 41fc54afae70 ("crypto: caam - simplfy clock initialization")
> > > Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
> > > Cc: Chris Healy <cphealy@xxxxxxxxx>
> > > Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> > > Cc: Horia Geantă <horia.geanta@xxxxxxx>
> > > Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> > > Cc: Iuliana Prodan <iuliana.prodan@xxxxxxx>
> > > Cc: linux-crypto@xxxxxxxxxxxxxxx
> > > Cc: linux-kernel@xxxxxxxxxxxxxxx
> > Tested-by: Horia Geantă <horia.geanta@xxxxxxx>
> >
> > Considering this is a boot hang, in case this does not make into v5.4
> > I would appreciate appending:
> > Cc: <stable@xxxxxxxxxxxxxxx>
>
> This patch does not apply against cryptodev or crypto.
Nevermind, I was trying to apply patch 4 on top of patch 1 which
is why it didn't work.
Cheers,
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
