Commit 0f2f02d1 authored Jun 25, 2017 by Gilad Ben-Yossef Committed by Greg Kroah-Hartman Jun 25, 2017

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: abefd674 ("staging: ccree: introduce CryptoCell HW driver").

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent d255b343

drivers/staging/ccree/ssi_request_mgr.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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;