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staging: ccree: use signal safe completion wait 

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 <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gilad Ben-Yossef 2017-06-25 10:47:24 +03:00 committed by Greg Kroah-Hartman
parent d255b343f5
commit 0f2f02d1b5
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/ccree/ssi_request_mgr.c
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@ -382,7 +382,8 @@ int send_request(
/* Wait upon sequence completion. /* Wait upon sequence completion.
* Return "0" -Operation done successfully. * Return "0" -Operation done successfully.
*/ */
return wait_for_completion_interruptible(&ssi_req->seq_compl); wait_for_completion(&ssi_req->seq_compl);
return 0;
} else { } else {
/* Operation still in process */ /* Operation still in process */
return -EINPROGRESS; return -EINPROGRESS;