Messages in this thread | | | Date | Thu, 7 Nov 2019 08:02:29 +0100 | From | "" <> | Subject | Re: [PATCH V2] tty: serial: fsl_lpuart: use the sg count from dma_map_sg |
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On Thu, Nov 07, 2019 at 02:50:11AM +0000, Peng Fan wrote: > From: Peng Fan <peng.fan@nxp.com> > > The dmaengine_prep_slave_sg needs to use sg count returned > by dma_map_sg, not use sport->dma_tx_nents, because the return > value of dma_map_sg is not always same with "nents". > > When enabling iommu for lpuart + edma, iommu framework may concatenate > two sgs into one. > > Fixes: 6250cc30c4c4e ("tty: serial: fsl_lpuart: Use scatter/gather DMA for Tx") > Cc: <stable@vger.kernel.org> > Signed-off-by: Peng Fan <peng.fan@nxp.com> > --- > > V2: > Assign ret to sport->dma_tx_nents, then we no need to fix dma_unmap_sg > Hi Greg, > I saw v1 patch merged to tty-next, please help to replace with V2 if this > is ok for you, or you need I have a follow up fix for v1.
I can not "replace" anything, my tree does not rebase, sorry. Please send fix-up patches on top of it if there is any changes that need to happen.
thanks,
greg k-h
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