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.smir...@gmail.com>
> Cc: Chris Healy <cphe...@gmail.com>
> Cc: Lucas Stach <l.st...@pengutronix.de>
> Cc: Horia Geantă <horia.gea...@nxp.com>
> Cc: Herbert Xu <herb...@gondor.apana.org.au>
> Cc: Iuliana Prodan <iuliana.pro...@nxp.com>
> Cc: linux-crypto@vger.kernel.org
> Cc: linux-ker...@vger.kernel.org
Tested-by: Horia Geantă <horia.gea...@nxp.com>
Considering this is a boot hang, in case this does not make into v5.4
I would appreciate appending:
Cc: <sta...@vger.kernel.org>
Thanks,
Horia
