On Wed, Jul 22, 2020 at 11:36:15PM +0000, Michael Kelley wrote:

From: Boqun Feng <redacted> Sent: Monday, July 20, 2020 6:42 PM

quoted

When PAGE_SIZE > HV_HYP_PAGE_SIZE, we need the ringbuffer size to be at
least 2 * PAGE_SIZE: one page for the header and at least one page of
the data part (because of the alignment requirement for double mapping).

So make sure the ringbuffer sizes to be at least 2 * PAGE_SIZE when
using vmbus_open() to establish the vmbus connection.

Signed-off-by: Boqun Feng <redacted>
---
 drivers/hid/hid-hyperv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-hyperv.c b/drivers/hid/hid-hyperv.c
index 0b6ee1dee625..36c5e157c691 100644
--- a/drivers/hid/hid-hyperv.c
+++ b/drivers/hid/hid-hyperv.c

@@ -104,8 +104,8 @@ struct synthhid_input_report {

 #pragma pack(pop)

-#define INPUTVSC_SEND_RING_BUFFER_SIZE		(40 * 1024)
-#define INPUTVSC_RECV_RING_BUFFER_SIZE		(40 * 1024)
+#define INPUTVSC_SEND_RING_BUFFER_SIZE		(128 * 1024)
+#define INPUTVSC_RECV_RING_BUFFER_SIZE		(128 * 1024)

Use max(40 * 1024, 2 * PAGE_SIZE) like in patch 8 of the series?

Sure! Will change it in next version.

Regards,
Boqun

quoted

 enum pipe_prot_msg_type {
--
2.27.0