Commit 4d31a258 authored by Jan Viktorin's avatar Jan Viktorin Committed by Greg Kroah-Hartman

uio: fix dmem_region_start computation

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: 0a0c3b5a ("Add new uio device for dynamic memory allocation")
Signed-off-by: default avatarJan Viktorin <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent e97b1c6a
......@@ -229,7 +229,7 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
priv->dmem_region_start = i;
priv->dmem_region_start = uiomem - &uioinfo->mem[0];
priv->num_dmem_regions = pdata->num_dynamic_regions;
for (i = 0; i < pdata->num_dynamic_regions; ++i) {
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