On Fri, Aug 16, 2013 at 03:34:09PM -0700, Greg KH wrote: > On Fri, Aug 16, 2013 at 05:47:39PM -0400, Tom Stellard wrote: > > From: Tom Stellard <thomas.stellard@xxxxxxx> > > > > Also add a new RADEON_INFO query to check that CP DMA packets are > > supported on the compute ring. > > > > v2: > > - Don't bump kms version, so this patch can be backported to stable > > kernels. > > Why is this for a stable kernel? What reported problem does it fix? > CP DMA has been supported since the 3.8 kernel, but due to an oversight we forgot to teach the CS checker that the CP DMA packet was legal for the compute ring on Southern Islands GPUs. This patch fixes a bug where the radeon driver will incorrectly reject a legal CP DMA packet from user space. I would like to have the patch backported to stable so that we don't have to require Mesa users to use a bleeding edge kernel in order to take advantage of this feature which is already present in the stable kernels (3.8 and newer). -Tom -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html