From: Alex Porosanu Date: Mon, 9 Sep 2013 15:56:28 +0000 (+0300) Subject: crypto: caam - fix RNG state handle instantiation descriptor X-Git-Tag: v3.13-rc2~35^2~44 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d5e4e999cda51eaa62e662088579fcce0ac79e92;p=kernel%2Fkernel-generic.git crypto: caam - fix RNG state handle instantiation descriptor The way the DECO runs a descriptor through the direct (debug) interface is different from the JRI interface: the DECO will continue to try and execute the next commands, after the descriptor buffer has ended. This leads to unpredictable results and possibly to locking up of the DECO. This patch adds a halt command at the end of the descriptor to ensure the DECO halts when it reaches the end of the descriptor buffer. Signed-off-by: Alex Porosanu Signed-off-by: Herbert Xu --- diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c index b010d42..11c7f29 100644 --- a/drivers/crypto/caam/ctrl.c +++ b/drivers/crypto/caam/ctrl.c @@ -73,6 +73,8 @@ static void build_instantiation_desc(u32 *desc) /* generate secure keys (non-test) */ append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG | OP_ALG_RNG4_SK); + + append_jump(desc, JUMP_CLASS_CLASS1 | JUMP_TYPE_HALT); } static int instantiate_rng(struct device *ctrldev) @@ -83,7 +85,7 @@ static int instantiate_rng(struct device *ctrldev) u32 *desc; int i, ret = 0; - desc = kmalloc(CAAM_CMD_SZ * 6, GFP_KERNEL | GFP_DMA); + desc = kmalloc(CAAM_CMD_SZ * 7, GFP_KERNEL | GFP_DMA); if (!desc) { dev_err(ctrldev, "can't allocate RNG init descriptor memory\n"); return -ENOMEM;