rpmsg_virtio: fix rpmsg_virtio_get_tx_payload_buffer() error #624
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If rpmsg_virtio_notify_wait() returns RPMSG_SUCCESS, we should not directly return NULL, but call rpmsg_virtio_get_tx_buffer to get the tx buffer again. Signed-off-by: Yongrong Wang <wangyongrong@xiaomi.com> Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
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If rpmsg_virtio_notify_wait() returns RPMSG_SUCCESS, we should not directly return NULL, but call rpmsg_virtio_get_tx_buffer to get the tx buffer again.
This is the new PR of #614, and you can find the detail discussions in #614