Acked-by: Ruchika Gupta <ruchika.gu...@freescale.com> > -----Original Message----- > From: Nitesh Lal [mailto:niteshnarayan...@freescale.com] > Sent: Friday, March 07, 2014 4:06 PM > To: linux-crypto@vger.kernel.org; Gupta Ruchika-R66431; Dutta Yashpal- > B05456; herb...@gondor.apana.org > Cc: Lal Nitesh-B44382 > Subject: [PATCH] crypto: caam - Dynamic memory allocation for caam_rng_ctx > object > > This patch allocates memory from DMAable region to the caam_rng_ctx object, > earlier it had been statically allocated which resulted in errorneous > behaviour on inserting the caamrng module at the runtime. > > Signed-off-by: Nitesh Lal <niteshnarayan...@freescale.com> > --- > drivers/crypto/caam/caamrng.c | 15 +++++++++------ > 1 file changed, 9 insertions(+), 6 deletions(-) > > diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c > index 28486b1..403d8d5 100644 > --- a/drivers/crypto/caam/caamrng.c > +++ b/drivers/crypto/caam/caamrng.c > @@ -76,7 +76,7 @@ struct caam_rng_ctx { > struct buf_data bufs[2]; > }; > > -static struct caam_rng_ctx rng_ctx; > +static struct caam_rng_ctx *rng_ctx; > > static inline void rng_unmap_buf(struct device *jrdev, struct buf_data *bd) > { @@ -137,7 +137,7 @@ static inline int submit_job(struct caam_rng_ctx *ctx, > int to_current) > > static int caam_read(struct hwrng *rng, void *data, size_t max, bool wait) > { > - struct caam_rng_ctx *ctx = &rng_ctx; > + struct caam_rng_ctx *ctx = rng_ctx; > struct buf_data *bd = &ctx->bufs[ctx->current_buf]; > int next_buf_idx, copied_idx; > int err; > @@ -237,12 +237,12 @@ static void caam_cleanup(struct hwrng *rng) > struct buf_data *bd; > > for (i = 0; i < 2; i++) { > - bd = &rng_ctx.bufs[i]; > + bd = &rng_ctx->bufs[i]; > if (atomic_read(&bd->empty) == BUF_PENDING) > wait_for_completion(&bd->filled); > } > > - rng_unmap_ctx(&rng_ctx); > + rng_unmap_ctx(rng_ctx); > } > > static void caam_init_buf(struct caam_rng_ctx *ctx, int buf_id) @@ -273,8 > +273,9 @@ static struct hwrng caam_rng = { > > static void __exit caam_rng_exit(void) > { > - caam_jr_free(rng_ctx.jrdev); > + caam_jr_free(rng_ctx->jrdev); > hwrng_unregister(&caam_rng); > + kfree(rng_ctx); > } > > static int __init caam_rng_init(void) > @@ -286,7 +287,9 @@ static int __init caam_rng_init(void) > pr_err("Job Ring Device allocation for transform failed\n"); > return PTR_ERR(dev); > } > - > + rng_ctx = kmalloc(sizeof(struct caam_rng_ctx), GFP_DMA); > + if (!rng_ctx) > + return -ENOMEM; > caam_init_rng(&rng_ctx, dev); > > dev_info(dev, "registering rng-caam\n"); > -- > 1.8.1.4 >
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