[PATCH v2 3/8] fetch-pack: directly end negotiation if ACK ready

When "ACK %s ready" is received, find_common() clears rev_list in an
attempt to stop further "have" lines from being sent [1]. It is much
more readable to explicitly break from the loop instead, so do this.

This means that the memory in priority queue will be reclaimed only upon
program exit, similar to the cases in which "ACK %s ready" is not
received. (A related problem occurs when do_fetch_pack() is invoked a
second time in the same process with a possibly non-empty priority
queue, but this will be solved in a subsequent patch in this patch set.)

[1] The rationale is further described in the originating commit
f2cba9299b ("fetch-pack: Finish negotation if remote replies "ACK %s
ready"", 2011-03-14).

Signed-off-by: Jonathan Tan <redacted>
---
 fetch-pack.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fetch-pack.c b/fetch-pack.c
index 2812499a5..09f5c83c4 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c

@@ -517,10 +517,8 @@ static int find_common(struct fetch_pack_args *args,
 					mark_common(commit, 0, 1);
 					retval = 0;
 					got_continue = 1;
-					if (ack == ACK_ready) {
-						clear_prio_queue(&rev_list);
+					if (ack == ACK_ready)
 						got_ready = 1;
-					}
 					break;
 					}
 				}

@@ -530,6 +528,8 @@ static int find_common(struct fetch_pack_args *args,
 				print_verbose(args, _("giving up"));
 				break; /* give up */
 			}
+			if (got_ready)
+				break;
 		}
 	}
 done:

@@ -1300,7 +1300,6 @@ static int process_acks(struct packet_reader *reader, struct oidset *common)
 		}
 
 		if (!strcmp(reader->line, "ready")) {
-			clear_prio_queue(&rev_list);
 			received_ready = 1;
 			continue;
 		}

-- 
2.17.0.768.g1526ddbba1.dirty