[patch -next] crypto: algif - signedness bug in skcipher_recvmsg_async()

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This needs to be signed because af_alg_make_sg() returns negative error
codes.

Fixes: a596999b7ddf ('crypto: algif - change algif_skcipher to be asynchronous')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index 506eb5f..142430f 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -537,7 +537,7 @@ static int skcipher_recvmsg_async(struct socket *sock, struct msghdr *msg,
 
 	while (iov_iter_count(&msg->msg_iter)) {
 		struct skcipher_async_rsgl *rsgl;
-		unsigned long used;
+		long used;
 
 		if (!ctx->used) {
 			err = skcipher_wait_for_data(sk, flags);
--
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