Messages in this thread | | | Date | Thu, 25 Jul 2013 10:22:50 +0800 | Subject | Re: [PATCH v2] dma: mmp_pdma: fix a memory alloc error | From | Xiang Wang <> |
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2013/7/5 Vinod Koul <vinod.koul@intel.com>: > On Tue, Jun 18, 2013 at 02:21:58PM +0800, Xiang Wang wrote: >> From: Xiang Wang <wangx@marvell.com> >> >> pdev->phy is of type "struct mmp_pdma_phy *". But when >> allocating memory for it, "struct mmp_pdma_chan" is used >> by mistake. >> >> Signed-off-by: Xiang Wang <wangx@marvell.com> >> --- >> drivers/dma/mmp_pdma.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c >> index c26699f..18ac57f 100644 >> --- a/drivers/dma/mmp_pdma.c >> +++ b/drivers/dma/mmp_pdma.c >> @@ -801,7 +801,7 @@ static int mmp_pdma_probe(struct platform_device *op) >> } >> >> pdev->phy = devm_kzalloc(pdev->dev, >> - dma_channels * sizeof(struct mmp_pdma_chan), GFP_KERNEL); >> + dma_channels * sizeof(*pdev->phy), GFP_KERNEL); > While at it, can you make the flag GFP_NOWAIT. that is the recommendation for > dmac drivers > > -- > ~Vinod
Hi, Vinod Would you please explain a little more about why we should use GFP_NOWAIT here? This memory is not dedicated for DMA controller. Do we have special reasons to use GFP_NOWAIT? Thanks!
-- Regards, Xiang
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