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SubjectRE: [PATCH v3 09/11] HID: hyperv: Make ringbuffer at least take two pages
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From: Boqun Feng <boqun.feng@gmail.com> Sent: Thursday, September 10, 2020 7:35 AM
>
> 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@gmail.com>
> Acked-by: Jiri Kosina <jkosina@suse.cz>
> ---
> Hi Jiri,
>
> Thanks for your acked-by. I make a small change in this version (casting
> 2 * PAGE_SIZE into int to avoid compiler warnings), and it make no
> functional change. If the change is inappropriate, please let me know.
>
> drivers/hid/hid-hyperv.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>

Reviewed-by: Michael Kelley <mikelley@microsoft.com>

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