From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Sun, 5 Sep 2010 12:25:13 +0100 Subject: [PATCH] arm: fix pci_set_consistent_dma_mask for dmabounce devices In-Reply-To: <20100902114937X.fujita.tomonori@lab.ntt.co.jp> References: <20100819174426O.fujita.tomonori@lab.ntt.co.jp> <20100901085738.GJ8142@n2100.arm.linux.org.uk> <20100902114937X.fujita.tomonori@lab.ntt.co.jp> Message-ID: <20100905112513.GB558@n2100.arm.linux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Sep 02, 2010 at 11:50:33AM +0900, FUJITA Tomonori wrote: > On Wed, 1 Sep 2010 09:57:38 +0100 > Russell King - ARM Linux wrote: > > > On Sat, Aug 28, 2010 at 07:58:11PM +0200, Krzysztof Halasa wrote: > > > What's the outcome of the following? > > > > > > Russell, are you going to apply it as is, or is a better (short-term) > > > fix being made? > > > > I want to see a better solution to this first - without which we'll > > apply this hack and then quietly forget about the problem. > > This restores the trick that had worked. > > btw, I can't compile ARCH_IXP4XX without the following patch: > > http://www.spinics.net/lists/arm-kernel/msg95933.html > > = > From: FUJITA Tomonori > Subject: [PATCH] arm: fix arm: fix pci_set_consistent_dma_mask for dmabounce devices > > This fixes the regression caused by the commit > 6fee48cd330c68332f9712bc968d934a1a84a32a. > > ARM needs to clip the dma coherent mask for dmabounce devices. This > restores the old trick. > > Note that strictly speaking, the DMA API doesn't allow architectures > to do such but I'm not sure it's worth adding the new API to set the > dma mask that allows architectures to clip it. > > Signed-off-by: FUJITA Tomonori Acked-by: Russell King Thanks.