On Mon, May 16, 2011 at 11:25:32AM +0530, Felix Varghese wrote: > On 13 May 2011 20:38, Greg KH <greg@xxxxxxxxx> wrote: > > Don't statically allocate memory for spi, you need to dynamically > > allocate it with 'kmalloc'. > > > > The fact that the first time didn't crash for you was just lucky. > > I'm guessing you say this because static variables are not in DMA > capable memory. But how exactly do we figure out which part of memory > is DMA-capable and which isn't? If you create the memory with a call to kmalloc() it is dma-capable. So always do that. > Also, is this a restriction imposed by the kernel or by the hardware? The hardware. USB also has this rule. thanks, greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
