On Mon, 9 Dec 2019 14:53:35 -0800 John Hubbard <jhubbard@xxxxxxxxxx> wrote: > After DMA is complete, and the device and CPU caches are synchronized, > it's still required to mark the CPU pages as dirty, if the data was > coming from the device. However, this driver was just issuing a > bare put_page() call, without any set_page_dirty*() call. > > Fix the problem, by calling set_page_dirty_lock() if the CPU pages > were potentially receiving data from the device. > > Reviewed-by: Christoph Hellwig <hch@xxxxxx> > Acked-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx> > Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> What are the user-visible effects of this change? As it's cc:stable I'd normally send this to Linus within 1-2 weeks, or sooner. Please confirm that this is a standalone fix, independent of the rest of this series.
