On 12/01/2020 17:29, Dmitry Osipenko wrote: > I was doing some experiments with I2C and noticed that Tegra APB DMA > driver crashes sometime after I2C DMA transfer termination. The crash > happens because tegra_dma_terminate_all() bails out immediately if pending > list is empty, thus it doesn't release the half-completed descriptors > which are getting re-used before ISR tasklet kicks-in. Can you elaborate a bit more on how these are getting re-used? What is the sequence of events which results in the panic? I believe that this was also reported in the past [0] and so I don't doubt there is an issue here, but would like to completely understand this. Thanks! Jon [0] https://lore.kernel.org/patchwork/patch/675349/ -- nvpublic
