[PATCH v2 1/8] tls: Factor tls_decrypt_async_drain() from recvmsg

[Chuck Lever <cel@kernel.org>]

From: Chuck Lever <chuck.lever@oracle.com>

The recvmsg path pairs tls_decrypt_async_wait() with
__skb_queue_purge(&ctx->async_hold). Bundling the two into
tls_decrypt_async_drain() gives later patches a single call for
async teardown.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 net/tls/tls_sw.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index a656ce235758..cedcc82669db 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -249,6 +249,18 @@ static int tls_decrypt_async_wait(struct tls_sw_context_rx *ctx)
 	return ctx->async_wait.err;
 }
 
+/* Collect all pending async AEAD completions and release the
+ * skbs held for them.  Returns the crypto error if any
+ * operation failed, zero otherwise.
+ */
+static int tls_decrypt_async_drain(struct tls_sw_context_rx *ctx)
+{
+	int ret = tls_decrypt_async_wait(ctx);
+
+	__skb_queue_purge(&ctx->async_hold);
+	return ret;
+}
+
 static int tls_do_decryption(struct sock *sk,
 			     struct scatterlist *sgin,
 			     struct scatterlist *sgout,
@@ -2223,8 +2235,7 @@ int tls_sw_recvmsg(struct sock *sk,
 		int ret;
 
 		/* Wait for all previously submitted records to be decrypted */
-		ret = tls_decrypt_async_wait(ctx);
-		__skb_queue_purge(&ctx->async_hold);
+		ret = tls_decrypt_async_drain(ctx);
 
 		if (ret) {
 			if (err >= 0 || err == -EINPROGRESS)
-- 
2.53.0