On Sun, Jul 10, 2016 at 11:50:49PM +0200, Robert Jarzmik wrote: > Implement the function which wait until a dma channel is stopped to have > a synchronization point. > > This also protects the pxad_remove() from races, such as spurious > interrupts while removing the driver, because : > - as long as there is one dma channel requested, ie. dma_chan_get() but > no dma_chan_put(), the try_module_get() of dma_chan_get() prevents > the remove() routine from running > - when the last channel is released, ie. the last dma_chan_put() is > called, if there is a running DMA, pxad_synchronize() is called > - pxad_synchronize() waits for the channel to stop, which in turn > ensures on pxa architecture that the interrupt cannot be fired anymore Applied, thanks -- ~Vinod -- 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
