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powerpc/warp: Fix ISA_DMA_THRESHOLD default

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If no device is passed to __dma_alloc_coherent, it defaults to using ISA_DMA_THRESHOLD
for the mask. This patch provides a reasonable default rather than 0.

Signed-off-by: Sean MacLennan <smaclennan@pikatech.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Sean MacLennan 2009-06-10 15:09:23 +00:00 committed by Benjamin Herrenschmidt
parent 247608234e
commit 79290e4b69
1 changed files with 7 additions and 1 deletions
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arch/powerpc/platforms/44x/warp.c
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@ -43,7 +43,13 @@ static int __init warp_probe(void)
{
unsigned long root = of_get_flat_dt_root();
return of_flat_dt_is_compatible(root, "pika,warp");
if (!of_flat_dt_is_compatible(root, "pika,warp"))
return 0;
/* For __dma_alloc_coherent */
ISA_DMA_THRESHOLD = ~0L;
return 1;
}
define_machine(warp) {