Messages in this thread Patch in this message |  | | From | Andrey Smirnov <> | Subject | [PATCH v7 6/9] crypto: caam - check if RNG job failed | Date | Mon, 27 Jan 2020 08:56:43 -0800 |
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We shouldn't stay silent if RNG job fails. Add appropriate code to check for that case and propagate error code up appropriately.
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 Cc: linux-imx@nxp.com --- drivers/crypto/caam/caamrng.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c index cb498186b9b9..790624ae83c6 100644 --- a/drivers/crypto/caam/caamrng.c +++ b/drivers/crypto/caam/caamrng.c @@ -52,6 +52,11 @@ struct caam_rng_ctx { struct kfifo fifo; }; +struct caam_rng_job_ctx { + struct completion *done; + int *err; +}; + static struct caam_rng_ctx *to_caam_rng_ctx(struct hwrng *r) { return container_of(r, struct caam_rng_ctx, rng); @@ -60,12 +65,12 @@ static struct caam_rng_ctx *to_caam_rng_ctx(struct hwrng *r) static void caam_rng_done(struct device *jrdev, u32 *desc, u32 err, void *context) { - struct completion *done = context; + struct caam_rng_job_ctx *jctx = context; if (err) - caam_jr_strstatus(jrdev, err); + *jctx->err = caam_jr_strstatus(jrdev, err); - complete(done); + complete(jctx->done); } static u32 *caam_init_desc(u32 *desc, dma_addr_t dst_dma, int len) @@ -89,6 +94,10 @@ static int caam_rng_read_one(struct device *jrdev, { dma_addr_t dst_dma; int err; + struct caam_rng_job_ctx jctx = { + .done = done, + .err = &err, + }; len = min_t(int, len, CAAM_RNG_MAX_FIFO_STORE_SIZE); @@ -101,7 +110,7 @@ static int caam_rng_read_one(struct device *jrdev, init_completion(done); err = caam_jr_enqueue(jrdev, caam_init_desc(desc, dst_dma, len), - caam_rng_done, done); + caam_rng_done, &jctx); if (!err) wait_for_completion(done); -- 2.21.0
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