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commit4d31a2588aupstream. The variable i contains a total number of resources (including IORESOURCE_IRQ). However, we want the dmem_region_start to point after the last resource of type IORESOURCE_MEM. The original behaviour leads (very likely) to skipping several UIO mapping regions and makes them useless. Fix this by computing dmem_region_start from the uiomem which points to the last used UIO mapping. Fixes:0a0c3b5a24("Add new uio device for dynamic memory allocation") Signed-off-by: Jan Viktorin <viktorin@rehivetech.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>