Patch "crypto: atmel - only treat EBUSY as transient if backlog" has been added to the 3.18-stable tree

This is a note to let you know that I've just added the patch titled

crypto: atmel - only treat EBUSY as transient if backlog

to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
crypto-atmel-only-treat-ebusy-as-transient-if-backlog.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Gilad Ben-Yossef <[email protected]>
Date: Wed, 28 Jun 2017 10:22:03 +0300
Subject: crypto: atmel - only treat EBUSY as transient if backlog

From: Gilad Ben-Yossef <[email protected]>

commit 1606043f214f912a52195293614935811a6e3e53 upstream.

The Atmel SHA driver was treating -EBUSY as indication of queueing to backlog without checking that backlog is enabled for the request.

Fix it by checking request flags.

---
 drivers/crypto/atmel-sha.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

@@ -957,7 +957,9 @@ static int atmel_sha_finup(struct ahash_
 	ctx->flags |= SHA_FLAGS_FINUP;
 
 	err1 = atmel_sha_update(req);
-	if (err1 == -EINPROGRESS || err1 == -EBUSY)
+	if (err1 == -EINPROGRESS ||
+	    (err1 == -EBUSY && (ahash_request_flags(req) &
+				CRYPTO_TFM_REQ_MAY_BACKLOG)))
 		return err1;
 
 	/*

Patches currently in stable-queue which might be from [email protected] are

queue-3.18/crypto-atmel-only-treat-ebusy-as-transient-if-backlog.patch