From: Himadri Pandya <himadrispandya@gmail.com>
Date: Thu, 25 Jul 2019 05:03:15 +0000
Patch-mainline: v5.5-rc1
Subject: Drivers: hv: util: Specify ring buffer size using Hyper-V page size
Git-commit: 0541a225945d5e0d650353f51614812aa820c6be
References: jsc#sle-12891

VMbus ring buffers are sized based on the 4K page size used by
Hyper-V. The Linux guest page size may not be 4K on all architectures
so use the Hyper-V page size to specify the ring buffer size.

Signed-off-by: Himadri Pandya <himadri18.07@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Acked-by: Olaf Hering <ohering@suse.de>
---
 drivers/hv/hv_util.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -413,8 +413,9 @@ static int util_probe(struct hv_device *dev,
 
 	hv_set_drvdata(dev, srv);
 
-	ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
-			srv->util_cb, dev->channel);
+	ret = vmbus_open(dev->channel, 4 * HV_HYP_PAGE_SIZE,
+			 4 * HV_HYP_PAGE_SIZE, NULL, 0, srv->util_cb,
+			 dev->channel);
 	if (ret)
 		goto error;