[PATCH 3/4] crypto: caam - fix RNG init descriptor ret. code checking
From: Horia Geantă <hidden>
Date: 2015-07-17 13:56:34
Subsystem:
crypto api, freescale caam (cryptographic acceleration and assurance module) driver, the rest · Maintainers:
Herbert Xu, "David S. Miller", Horia Geantă, Pankaj Gupta, Gaurav Jain, Linus Torvalds
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 Geantă <redacted> --- drivers/crypto/caam/ctrl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
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;
--
2.4.4