[PATCH 2/3] crypto: stm32/hash: fix performance issues

[Lionel Debieve]

From: Lionel Debieve <lionel.debi...@st.com>

Fixing bugs link to stress tests. Bad results are
detected during testmgr selftests executing in a
faster environment. bufcnt value may be resetted and
false IT are sometimes detected.

Signed-off-by: Lionel Debieve <lionel.debi...@st.com>
---
 drivers/crypto/stm32/stm32-hash.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/stm32/stm32-hash.c 
b/drivers/crypto/stm32/stm32-hash.c
index 73cdc3b4dca8..d8444aeb6609 100644
--- a/drivers/crypto/stm32/stm32-hash.c
+++ b/drivers/crypto/stm32/stm32-hash.c
@@ -743,13 +743,15 @@ static int stm32_hash_final_req(struct stm32_hash_dev 
*hdev)
        struct ahash_request *req = hdev->req;
        struct stm32_hash_request_ctx *rctx = ahash_request_ctx(req);
        int err;
+       int buflen = rctx->bufcnt;
+
+       rctx->bufcnt = 0;
 
        if (!(rctx->flags & HASH_FLAGS_CPU))
                err = stm32_hash_dma_send(hdev);
        else
-               err = stm32_hash_xmit_cpu(hdev, rctx->buffer, rctx->bufcnt, 1);
+               err = stm32_hash_xmit_cpu(hdev, rctx->buffer, buflen, 1);
 
-       rctx->bufcnt = 0;
 
        return err;
 }
@@ -1096,6 +1098,8 @@ static irqreturn_t stm32_hash_irq_handler(int irq, void 
*dev_id)
                reg &= ~HASH_SR_OUTPUT_READY;
                stm32_hash_write(hdev, HASH_SR, reg);
                hdev->flags |= HASH_FLAGS_OUTPUT_READY;
+               /* Disable IT*/
+               stm32_hash_write(hdev, HASH_IMR, 0);
                return IRQ_WAKE_THREAD;
        }
 
-- 
2.15.1