On Thursday 15 May 2014 11:18:37 Thomas Petazzoni wrote: > @@ -445,7 +452,7 @@ int pci_ioremap_io(unsigned int offset, phys_addr_t phys_addr) > return ioremap_page_range(PCI_IO_VIRT_BASE + offset, > PCI_IO_VIRT_BASE + offset + SZ_64K, > phys_addr, > - __pgprot(get_mem_type(MT_DEVICE)->prot_pte)); > + __pgprot(get_mem_type(pci_ioremap_mem_type)->prot_pte)); > } > EXPORT_SYMBOL_GPL(pci_ioremap_io); > As discussed on IRC, I think we'd be better off making this a strong-ordered mapping for all platforms unconditionally. The PCI I/O space semantics require non-posted writes, which is the main difference between device and SO mappings, so the same fix is required both for mvebu as a workaround for the deadlock as well as for everyone else as a fix for an incorrect PCI behavior. Arnd -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
