Hi, On Tue, Aug 07, 2012 at 05:02:27AM -0700, Tony Lindgren wrote: > * Shubhrajyoti <shubhrajyoti@xxxxxx> [120807 04:21]: > > On Tuesday 07 August 2012 01:17 PM, Tony Lindgren wrote: > > >> }; > > > Don't you need to check separately for rx and tx dma? There's a slight > > > chance that you get a channel for one but not for the other.. > > In that case I treat it as non usable and fall back to pio. > > OK that should work too. > > > Are you suggesting that let one channel be dma and only the failed one pio? > > I guess both are doable. For reduced CPU load using DMA where possible > of course is the best way to go. indeed. if you can get DMA for TX but not for RX, then at least TX can go via DMA ;-) -- balbi
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