On 20-06-24, 10:38, Frank Li wrote: > On Thu, Jun 20, 2024 at 10:53:53AM +0800, Jie Hai wrote: > > List desc_allocated was introduced for the case of a transfer > > submitted multiple times. But elegating descriptors on the list > > causes other problems. > > > > For example, in the multi-thread scenario, which tasks are > > continuously created and submitted by each thread. If one of > > the threads calls dmaengine_terminate_all, for dirvers using > > vchan_get_all_descriptors, all descriptors will be freed. If > > there's another thread submitting a transfer A by > > vchan_tx_submit, the following results may be generated: > > 1. desc A is freeing -> visit wrong address of node prep/next. > > 2. desc A is freed -> visit invalid address of A. > > > > In the above case, calltrace is generated and the system is > > suspended. This can be tested by dmatest. > > What's test steps to reproduce this problem? I think I have asked in past (dont recall if that was this or some other one), hopefully will get to hear on this one.. PS: Good hygiene to trim replies -- ~Vinod
