[PATCH 2/2] Drivers: hv: util: Specify ring buffer size using Hyper-V page size

From: Himadri Pandya
Date: Thu Jul 25 2019 - 11:01:31 EST


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@xxxxxxxxx>
---
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
index c2c08f26bd5f..766bd8457346 100644
--- 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;

--
2.17.1