Messages in this thread | | | Date | Wed, 10 Sep 2014 12:45:30 +0100 | From | Mark Brown <> | Subject | Re: [PATCH v5] spi: spi-imx: add DMA support |
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On Wed, Sep 10, 2014 at 07:22:59PM +0800, Robin Gong wrote: > On Wed, Sep 10, 2014 at 11:21:05AM +0100, Mark Brown wrote:
> > This isn't going to work, anything that looks at the usedma flag will > > see the result of the last thing that was checked which may or may not > > be the transfer that it's handling. The driver should check to see if > > the core mapped the transfer for DMA.
> Yes, you're right. I should use "transfer->tx_sg->sgl == NULL" or > "transfer->rx_sg->sgl == NULL" instead of usedma flag in driver, right?
Right. [unhandled content-type:application/pgp-signature] | |