From 065fa2523da83c674d8533144d9c9bac986ccf80 Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Tue, 27 Feb 2018 15:30:35 +0200 Subject: [PATCH] crypto: omap-crypto - Verify page zone scatterlists before starting DMA In certain platforms like DRA7xx having memory > 2GB with LPAE enabled has a constraint that DMA can be done with the initial 2GB and marks it as ZONE_DMA. But openssl when used with cryptodev does not make sure that input buffer is DMA capable. So, adding a check to verify if the input buffer is capable of DMA. Signed-off-by: Tero Kristo Signed-off-by: Herbert Xu --- drivers/crypto/omap-crypto.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/crypto/omap-crypto.c b/drivers/crypto/omap-crypto.c index 23e37779317e..2c42e4b4a6e9 100644 --- a/drivers/crypto/omap-crypto.c +++ b/drivers/crypto/omap-crypto.c @@ -104,6 +104,10 @@ static int omap_crypto_check_sg(struct scatterlist *sg, int total, int bs, return OMAP_CRYPTO_NOT_ALIGNED; if (!IS_ALIGNED(sg->length, bs)) return OMAP_CRYPTO_NOT_ALIGNED; +#ifdef CONFIG_ZONE_DMA + if (page_zonenum(sg_page(sg)) != ZONE_DMA) + return OMAP_CRYPTO_NOT_ALIGNED; +#endif len += sg->length; sg = sg_next(sg); -- 2.45.2