I can seem to do everything else just fine with my scanner, using WIA and VBA, but when I try to set my scanner to detect the page size, I get an error message "The parameter is incorrect." ...

I often find ioremap just use PAGE_SIZE as its size like: drivers/spi/spi-orion.c:715: dir_acc->vaddr = devm_ioremap(&pdev->dev, r->start, PAGE_SIZE); drivers/gpu/ipu-v3/ipu-dmfc.c...