Messages in this thread | | | From | Horia Geanta <> | Subject | Re: [PATCH 07/12] crypto: caam - use devres to de-initialize the RNG | Date | Mon, 9 Sep 2019 15:39:26 +0000 |
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On 9/4/2019 5:35 AM, Andrey Smirnov wrote: > Use devres to de-initialize the RNG and drop explicit de-initialization > code in caam_remove(). > > Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> > Cc: Chris Healy <cphealy@gmail.com> > Cc: Lucas Stach <l.stach@pengutronix.de> > Cc: Horia Geantă <horia.geanta@nxp.com> > Cc: Herbert Xu <herbert@gondor.apana.org.au> > Cc: Iuliana Prodan <iuliana.prodan@nxp.com> > Cc: linux-crypto@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > --- > drivers/crypto/caam/ctrl.c | 129 ++++++++++++++++++++----------------- > 1 file changed, 70 insertions(+), 59 deletions(-) > > diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c > index 254963498abc..25f8f76551a5 100644 > --- a/drivers/crypto/caam/ctrl.c > +++ b/drivers/crypto/caam/ctrl.c > @@ -175,6 +175,73 @@ static inline int run_descriptor_deco0(struct device *ctrldev, u32 *desc, > return 0; > } > > +/* > + * deinstantiate_rng - builds and executes a descriptor on DECO0, > + * which deinitializes the RNG block. > + * @ctrldev - pointer to device > + * @state_handle_mask - bitmask containing the instantiation status > + * for the RNG4 state handles which exist in > + * the RNG4 block: 1 if it's been instantiated > + * > + * Return: - 0 if no error occurred > + * - -ENOMEM if there isn't enough memory to allocate the descriptor > + * - -ENODEV if DECO0 couldn't be acquired > + * - -EAGAIN if an error occurred when executing the descriptor > + */ > +static int deinstantiate_rng(struct device *ctrldev, int state_handle_mask) I assume this function is not modified, only moved further up to avoid forward declaration.
> + if (!ret) { > + ret = devm_add_action_or_reset(ctrldev, devm_deinstantiate_rng, > + ctrldev); > } Braces not needed.
Is there any guidance wrt. when *not* to use devres?
Horia
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