On Thu, 2010-09-16 at 13:37 +0800, Zhenyu Wang wrote: > On 2010.09.16 13:10:29 +0800, Xiang, Haihao wrote: > > > Or can't that be done in init function by using advance_ring? > > advance_ring uses ring->tail to set TAIL register, i965_reset() also > > invokes ring->init() to re-init ring buffer, how to guarantee ring->tail > > is 0? BTW advance_ring can be implemented as set_tail(dev, ring->tail). > > > > oh, that's bad, not only just for render ring, but ring tail should > always be inited correctly, not just in static variable.. > init_ring_common() always inits ring tail. so it is not just in static variable.
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