On 19/05/16 12:21, Niklas Söderlund wrote:
Hi Konrad,
Thanks for your feedback.
On 2016-05-17 10:50:02 -0400, Konrad Rzeszutek Wilk wrote:
+void debug_dma_map_resource(struct device *dev, phys_addr_t addr, size_t size,
+ int direction, dma_addr_t dma_addr)
+{
+ struct dma_debug_entry *entry;
+
+ if (unlikely(dma_debug_disabled()))
+ return;
+
+ entry = dma_entry_alloc();
+ if (!entry)
+ return;
+
+ entry->type = dma_debug_resource;
+ entry->dev = dev;
+ entry->pfn = __phys_to_pfn(addr);
+ entry->offset = addr - PHYS_PFN(entry->pfn);
Is that right?
You are correct that should be:
entry->offset = addr - PFN_PHYS(entry->pfn);
Or even better:
entry->offset = addr - __pfn_to_phys(entry->pfn);
Better still, simply offset_in_page(addr) (as per dma_map_single()).
Robin.
I will address this and resend late next week, still hoping for some
more feedback.
__phys_to_pfn(addr) is PHYS_PFN(addr), so what you get here is
addr - PHYS_PFN(PHYS_PFN(addr)) ?
+ entry->size = size;
+ entry->dev_addr = dma_addr;
+ entry->direction = direction;
+ entry->map_err_type = MAP_ERR_NOT_CHECKED;
+
+ add_dma_entry(entry);
+}
+EXPORT_SYMBOL(debug_dma_map_resource);
+
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