On Fri, May 02, 2014 at 11:05:16AM -0400, Santosh Shilimkar wrote:

On Friday 02 May 2014 10:58 AM, Russell King - ARM Linux wrote:

quoted

On Thu, Apr 24, 2014 at 11:30:05AM -0400, Santosh Shilimkar wrote:

quoted

 static inline void *dma_to_virt(struct device *dev, dma_addr_t addr)
 {
-	return (void *)__bus_to_virt((unsigned long)addr);
+	if (!dev)
+		return (void *)__bus_to_virt((unsigned long)addr);
+	else
+		return (void *)__bus_to_virt(__pfn_to_bus(dma_to_pfn(dev, addr)));

This is quite horrendous.  There's easier ways to do this...  I assume
you haven't looked at the assembler resulting from this at all with
stuff like the p2v patching enabled?

I haven't. Will check.

	if (dev) {
		unsigned long pfn = dma_to_pfn(dev, addr);

		return phys_to_virt(__pfn_to_phys(pfn));
	}

	return (void *)__bus_to_virt((unsigned long)addr);

quoted

quoted

 static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
 {
-	return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
+	if (!dev)
+		return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
+	else
+		return pfn_to_dma(dev,
+				__bus_to_pfn(__virt_to_bus((unsigned long)(addr))));

Same here.

ok.

	if (dev)
		return pfn_to_dma(dev, virt_to_pfn(addr));

	return (dma_addr_t)__virt_to_bus((unsigned long)(addr));

-- 
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.