Messages in this thread | | | From | Yao Yuan <> | Subject | RE: [PATCH v3 1/2] i2c: add DMA support for freescale i2c driver | Date | Wed, 26 Mar 2014 05:56:34 +0000 |
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On Wednesday, March 26, 2014 at 11:43:27 AM, Marek Vasut wrote: > On Wednesday, March 26, 2014 at 04:08:27 AM, Yao Yuan wrote: > > [...] > > > > > + i2c_imx->use_dma = false; > > > > + } else if (i2c_imx_dma_request(i2c_imx, (dma_addr_t)phy_addr)) > { > > > > + dev_info(&pdev->dev, > > > > + "can't request dma chan, faild use dma.\n"); > > > > + i2c_imx->use_dma = false; > > > > + } else { > > > > + i2c_imx->use_dma = true; > > > > + } > > > > > > Can you not just check if i2c_imx->dma is valid pointer or NULL > pointer ? > > > Then you won't need a separate variable, for this purpose ... right ? > > > > Sorry and I think what I know is just to check whether it is NULL. > > Then for the second question, maybe there are some other ways, But I > > think it is more tidy and easier understanding for using a separate > > variable, for this purpose. > > You are just wasting space and duplicating data, unless I am wrong. >
Well, Do you have a better idea? Although I think it's necessary.
Best regards, Yuan Yao
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