On 13.01.2015 16:01, Hans Verkuil wrote:
Hi Raimonds, Jurgen, Can you both test this patch? It should (I hope) solve the problems you both had with the cx23885 driver. This patch fixes a race condition in the vb2_thread that occurs when the thread is stopped. The crucial fix is calling kthread_stop much earlier in vb2_thread_stop(). But I also made the vb2_thread more robust.
With this patch I am unable to get any error except first (AMD-Vi: Event logged [IO_PAGE_FAULT...). But I am not convinced, because before patch I get first error much often and earlier than almost any other error, so it may be just "bad luck" and other errors do not appear because first error appear earlier. BTW question about RISC engine: what kind of memory use RISC engine to store DMA programs (code)? Internal SRAM or host's? I ask because "cx23885[0]: mpeg risc op code error" error message storm after first message looks like RISC engine used host's memory when this memory was unmapped. Raimonds Cicans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
