From 32107e43b505de44ebe1917da2c8c6229acbd509 Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Thu, 19 Mar 2020 09:12:29 -0700 Subject: crypto: caam - check if RNG job failed MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Horia Geantă Cc: Chris Healy Cc: Lucas Stach Cc: Horia Geantă Cc: Herbert Xu Cc: Iuliana Prodan Cc: linux-crypto@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-imx@nxp.com Signed-off-by: Herbert Xu --- drivers/crypto/caam/caamrng.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c index e64f2d77fa03..d0027d31e840 100644 --- a/drivers/crypto/caam/caamrng.c +++ b/drivers/crypto/caam/caamrng.c @@ -44,6 +44,11 @@ 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 (struct caam_rng_ctx *)r->priv; @@ -52,12 +57,12 @@ 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) @@ -80,7 +85,11 @@ static int caam_rng_read_one(struct device *jrdev, struct completion *done) { dma_addr_t dst_dma; - int err; + int err, ret = 0; + struct caam_rng_job_ctx jctx = { + .done = done, + .err = &ret, + }; len = min_t(int, len, CAAM_RNG_MAX_FIFO_STORE_SIZE); @@ -93,7 +102,7 @@ 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 == -EINPROGRESS) { wait_for_completion(done); err = 0; @@ -101,7 +110,7 @@ static int caam_rng_read_one(struct device *jrdev, dma_unmap_single(jrdev, dst_dma, len, DMA_FROM_DEVICE); - return err ?: len; + return err ?: (ret ?: len); } static void caam_rng_fill_async(struct caam_rng_ctx *ctx) -- cgit v1.2.3