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From 6313c97af86d08de7928433ab29ed4450f49c425 Mon Sep 17 00:00:00 2001
From: Richard Jones <>
Date: Thu, 11 Jun 2015 11:40:12 +0200
Subject: [PATCH 12/30] curl: Remove erroneous sleep waiting for curl

Message-id: <>
Patchwork-id: 65841
O-Subject: [RHEL-7.2 qemu-kvm v3 PATCH 05/21] curl: Remove erroneous sleep waiting for curl completion
Bugzilla: 1226684
RH-Acked-by: Miroslav Rezanina <>
RH-Acked-by: Stefan Hajnoczi <>
RH-Acked-by: Laszlo Ersek <>

From: Matthew Booth <>

The driver will not start more than a fixed number of curl sessions.
If it needs more, it must wait for the completion of an existing one.
The driver was sleeping, which will prevent the main loop from
running, and therefore the event it's waiting on. It was also directly
calling its internal handler rather than waiting on existing
registered handlers to be called from the main loop.

This change causes it simply to wait for a period of time whilst
allowing the main loop to execute.

Signed-off-by: Matthew Booth <>
Tested-by: Richard W.M. Jones <>
Signed-off-by: Kevin Wolf <>

Upstream-status: e466183718bfaaf347a3c02499473068a0072114
Signed-off-by: Miroslav Rezanina <>
 block/curl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/block/curl.c b/block/curl.c
index 8c707e1..e06c222 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -289,8 +289,7 @@ static CURLState *curl_init_state(BDRVCURLState *s)
         if (!state) {
-            g_usleep(100);
-            curl_multi_do(s);
+            qemu_aio_wait();
     } while(!state);