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ARM: 7380/1: DT: do not add a zero-sized memory property

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Some bootloaders are broken enough to expose an ATAG_MEM with
a null size. Converting such tag to a memory node leads to
an unbootable system.

Skip over zero sized ATAG_MEM to avoid this situation.

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Marc Zyngier 2012-04-11 14:52:56 +01:00 committed by Russell King
parent 9c5fd9e85f
commit a106b21a35
1 changed files with 2 additions and 0 deletions
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2
arch/arm/boot/compressed/atags_to_fdt.c
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@ -77,6 +77,8 @@ int atags_to_fdt(void *atag_list, void *fdt, int total_space)
} else if (atag->hdr.tag == ATAG_MEM) {
if (memcount >= sizeof(mem_reg_property)/4)
continue;
if (!atag->u.mem.size)
continue;
mem_reg_property[memcount++] = cpu_to_fdt32(atag->u.mem.start);
mem_reg_property[memcount++] = cpu_to_fdt32(atag->u.mem.size);
} else if (atag->hdr.tag == ATAG_INITRD2) {