On Tue, May 13, 2014 at 11:10:37AM +0100, Thomas Petazzoni wrote: > Due to a design incompatibility between the PCIe Marvell controller > and the Cortex-A9, stressing PCIe devices with a lot of traffic > quickly causes a deadlock. > > One part of the workaround for this is to have all PCIe regions mapped > as MT_MEMORY_SO instead of MT_DEVICE. While the arch_ioremap_caller() > mechanism allows sub-architecture code to override ioremap(), used to > map PCIe memory regions, there isn't such a mechanism to override the > behavior of pci_ioremap_io(). > > This commit adds the arch_pci_ioremap_mem_type variable, initialized > to MT_DEVICE by default, and that sub-architecture code can > override. We have chosen to expose a single variable rather than > offering the possibility of overriding the entire pci_ioremap_io(), > because implementing pci_ioremap_io() requires calling functions > (get_mem_type()) that are private to the arch/arm/mm/ code. > > Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> -- 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
