From: Horia Geant? <horia.geanta@freescale.com>
Date: Fri, 17 Jul 2015 13:54:53 +0000 (+0300)
Subject: crypto: caam - fix RNG init descriptor ret. code checking
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=62743a4145bb9;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

crypto: caam - fix RNG init descriptor ret. code checking

When successful, the descriptor that performs RNG initialization
is allowed to return a status code of 7000_0000h, since last command
in the descriptor is a JUMP HALT.

Signed-off-by: Horia Geant? <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index b924477c0d83..189180976167 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -175,7 +175,7 @@ static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
 {
 	struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctrldev);
 	struct caam_ctrl __iomem *ctrl;
-	u32 *desc, status, rdsta_val;
+	u32 *desc, status = 0, rdsta_val;
 	int ret = 0, sh_idx;
 
 	ctrl = (struct caam_ctrl __iomem *)ctrlpriv->ctrl;
@@ -207,7 +207,8 @@ static int instantiate_rng(struct device *ctrldev, int state_handle_mask,
 		 * CAAM eras), then try again.
 		 */
 		rdsta_val = rd_reg32(&ctrl->r4tst[0].rdsta) & RDSTA_IFMASK;
-		if (status || !(rdsta_val & (1 << sh_idx)))
+		if ((status && status != JRSTA_SSRC_JUMP_HALT_CC) ||
+		    !(rdsta_val & (1 << sh_idx)))
 			ret = -EAGAIN;
 		if (ret)
 			break;