linux-kernel - [PATCH 5/7] hv: check all present cpus in vmbus_wait_for

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Message-Id: <1480078123-17582-6-git-send-email-vkuznets@redhat.com>
Date:   Fri, 25 Nov 2016 13:48:41 +0100
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     devel@...uxdriverproject.org
Cc:     linux-kernel@...r.kernel.org,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: [PATCH 5/7] hv: check all present cpus in vmbus_wait_for_unload()

It should never happen, but let's get prepared to receiving a confirmation
for VMBus unload on an offlined CPU. As we allocate all structures for all
present CPUs now it's safe.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
 drivers/hv/channel_mgmt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 1bc1d479..5011c95 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -674,7 +674,7 @@ static void vmbus_wait_for_unload(void)
 		if (completion_done(&vmbus_connection.unload_event))
 			break;
 
-		for_each_online_cpu(cpu) {
+		for_each_present_cpu(cpu) {
 			page_addr = hv_context.synic_message_page[cpu];
 			msg = (struct hv_message *)page_addr +
 				VMBUS_MESSAGE_SINT;
@@ -700,7 +700,7 @@ static void vmbus_wait_for_unload(void)
 	 * maybe-pending messages on all CPUs to be able to receive new
 	 * messages after we reconnect.
 	 */
-	for_each_online_cpu(cpu) {
+	for_each_present_cpu(cpu) {
 		page_addr = hv_context.synic_message_page[cpu];
 		msg = (struct hv_message *)page_addr + VMBUS_MESSAGE_SINT;
 		msg->header.message_type = HVMSG_NONE;
-- 
2.7.4