On Thu, Apr 17, 2014 at 07:56:50PM -0500, Joel Fernandes wrote: > Free the vd (virt descriptor) after the callback is called. In EDMA driver > atleast which uses virt-dma, we make use of the desc during the callback and if > its dangerously freed before the callback is called. I also noticed this in > omap-dma dmaengine driver. You've missed the vital bit of information: why do you make use of the descriptor afterwards? You shouldn't. omap-dma doesn't either. Once clients submit their request to DMA engine, they must not hold any kind of reference to the descriptor other than the cookie. -- FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly improving, and getting towards what was expected from it. -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
