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Date: Fri, 5 Sep 2014 11:23:22 -0700 From: "K. Y. Srinivasan" <kys@...rosoft.com> To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org, devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com, jasowang@...hat.com Cc: "K. Y. Srinivasan" <kys@...rosoft.com> Subject: [PATCH 1/1] Drivers: hv: vmbus: Enable interrupt driven flow control This is a win8 feature that has been implemented. Turn on the feature bit to enable the feature. With this feature turned on, when the host is waiting for space to become available on the ringbuffer (host to guest), the guest will interrupt the host when space becomes available (as part of draining the ring buffer). Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com> --- drivers/hv/ring_buffer.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index 15db66b..6361d12 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -361,6 +361,11 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, ring_info->ring_buffer->read_index = ring_info->ring_buffer->write_index = 0; + /* + * Set the feature bit for enabling flow control. + */ + ring_info->ring_buffer->feature_bits.value = 1; + ring_info->ring_size = buflen; ring_info->ring_datasize = buflen - sizeof(struct hv_ring_buffer); -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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