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bus: mvebu-mbus: Fix optional pcie-mem/io-aperture properties

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If the property was not specified then the returned resource had a
resource_size(..) == 1, rather than 0. The PCI-E driver checks for 0 so it
blindly continues on with a corrupted resource.

The regression was introduced into v3.12 by:

  11be654 PCI: mvebu: Adapt to the new device tree layout

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Jason Gunthorpe 2013-09-17 14:11:04 -06:00 committed by Jason Cooper
parent b643f85814
commit 8553bcad3e
1 changed files with 4 additions and 2 deletions
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6
drivers/bus/mvebu-mbus.c
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@ -865,11 +865,13 @@ static void __init mvebu_mbus_get_pcie_resources(struct device_node *np,
int ret;
/*
* These are optional, so we clear them and they'll
* be zero if they are missing from the DT.
* These are optional, so we make sure that resource_size(x) will
* return 0.
*/
memset(mem, 0, sizeof(struct resource));
mem->end = -1;
memset(io, 0, sizeof(struct resource));
io->end = -1;
ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg));
if (!ret) {