From: Boqun Feng <boqun.feng@xxxxxxxxx> Sent: Monday, July 20, 2020 6:42 PM
>
> 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 <boqun.feng@xxxxxxxxx>
> ---
> 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?
>
>
> enum pipe_prot_msg_type {
> --
> 2.27.0
