[PATCH v3 6/6] staging: ccree: use signal safe completion wait

[Gilad Ben-Yossef]

We were waiting for a completion notification of HW DMA
operation using an interruptible wait which can result
in data corruption if a signal interrupted us while
DMA was not yet completed.

Fix this by moving to uninterrupted wait.

Fixes: abefd6741d ("staging: ccree: introduce CryptoCell HW driver").

Signed-off-by: Gilad Ben-Yossef <gi...@benyossef.com>
---
 drivers/staging/ccree/ssi_request_mgr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/ccree/ssi_request_mgr.c 
b/drivers/staging/ccree/ssi_request_mgr.c
index 7c2d88a..2c6937a 100644
--- a/drivers/staging/ccree/ssi_request_mgr.c
+++ b/drivers/staging/ccree/ssi_request_mgr.c
@@ -382,7 +382,8 @@ int send_request(
                /* Wait upon sequence completion.
                 *  Return "0" -Operation done successfully.
                 */
-               return wait_for_completion_interruptible(&ssi_req->seq_compl);
+               wait_for_completion(&ssi_req->seq_compl);
+               return 0;
        } else {
                /* Operation still in process */
                return -EINPROGRESS;
-- 
2.1.4