From 5a793bcadbe97df7823598b429c0af052e50df1c Mon Sep 17 00:00:00 2001 From: Tero Kristo Date: Thu, 4 Aug 2016 13:28:39 +0300 Subject: [PATCH] crypto: omap-sham - fix software fallback handling If we have processed any data with the hardware accelerator (digcnt > 0), we must complete the entire hash by using it. This is because the current hash value can't be imported to the software fallback algorithm. Otherwise we end up with wrong hash results. Signed-off-by: Tero Kristo Signed-off-by: Herbert Xu --- drivers/crypto/omap-sham.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index fd50005..f788319 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -1163,7 +1163,7 @@ static int omap_sham_final(struct ahash_request *req) * If buffersize is less than 240, we use fallback SW encoding, * as using DMA + HW in this case doesn't provide any benefit. */ - if ((ctx->digcnt + ctx->bufcnt) < 240) + if (!ctx->digcnt && ctx->bufcnt < 240) return omap_sham_final_shash(req); else if (ctx->bufcnt) return omap_sham_enqueue(req, OP_FINAL); -- 2.7.4