Patch "crypto: atmel - only treat EBUSY as transient if backlog" has been added to the 4.4-stable tree

Patch "crypto: atmel - only treat EBUSY as transient if backlog" has been added to the 4.4-stable tree

[gregkh]

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 4.4-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-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1606043f214f912a52195293614935811a6e3e53 Mon Sep 17 00:00:00 2001
From: Gilad Ben-Yossef <gilad@benyossef.com>
Date: Wed, 28 Jun 2017 10:22:03 +0300
Subject: crypto: atmel - only treat EBUSY as transient if backlog

From: Gilad Ben-Yossef <gilad@benyossef.com>

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.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -963,7 +963,9 @@ 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 gilad@benyossef.com are

queue-4.4/crypto-atmel-only-treat-ebusy-as-transient-if-backlog.patch