releases/4.14.44/crypto-inside-secure-wait-for-the-request-to-complete-if-in-the-backlog.patch

   1 From foo@baz Thu May 24 11:09:34 CEST 2018
   2 From: Antoine Tenart <antoine.tenart@bootlin.com>
   3 Date: Mon, 26 Feb 2018 14:45:12 +0100
   4 Subject: crypto: inside-secure - wait for the request to complete if in the backlog
   5
   6 From: Antoine Tenart <antoine.tenart@bootlin.com>
   7
   8 [ Upstream commit 4dc5475ae0375ea4f9283dfd9b2ddc91b20d4c4b ]
   9
  10 This patch updates the safexcel_hmac_init_pad() function to also wait
  11 for completion when the digest return code is -EBUSY, as it would mean
  12 the request is in the backlog to be processed later.
  13
  14 Fixes: 1b44c5a60c13 ("crypto: inside-secure - add SafeXcel EIP197 crypto engine driver")
  15 Suggested-by: Ofer Heifetz <oferh@marvell.com>
  16 Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
  17 Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
  18 Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
  19 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  20 ---
  21  drivers/crypto/inside-secure/safexcel_hash.c |    2 +-
  22  1 file changed, 1 insertion(+), 1 deletion(-)
  23
  24 --- a/drivers/crypto/inside-secure/safexcel_hash.c
  25 +++ b/drivers/crypto/inside-secure/safexcel_hash.c
  26 @@ -819,7 +819,7 @@ static int safexcel_hmac_init_pad(struct
  27                 init_completion(&result.completion);
  28
  29                 ret = crypto_ahash_digest(areq);
  30 -               if (ret == -EINPROGRESS) {
  31 +               if (ret == -EINPROGRESS || ret == -EBUSY) {
  32                         wait_for_completion_interruptible(&result.completion);
  33                         ret = result.error;
  34                 }