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armv8/fsl-lsch3: fdt: Check the pointer returned from call to a function may be NULL

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Pointer 'reg' returned from call to function 'fdt_getprop' may be
NULL, will be passed to function and may be dereferenced there by
passing argument 1 to function 'of_read_number'. So check pointer
'reg' first.

Signed-off-by: Alison Wang <alison.wang@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Alison Wang
2015-09-01 10:47:27 +08:00
committed by York Sun
parent da77c81990
commit 6a00a9cb15
1 changed files with 1 additions and 1 deletions
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2
arch/arm/cpu/armv8/fsl-lsch3/fdt.c
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@@ -33,8 +33,8 @@ void ft_fixup_cpu(void *blob)
off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4); off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
while (off != -FDT_ERR_NOTFOUND) { while (off != -FDT_ERR_NOTFOUND) {
reg = (fdt32_t *)fdt_getprop(blob, off, "reg", 0); reg = (fdt32_t *)fdt_getprop(blob, off, "reg", 0);
core_id = of_read_number(reg, addr_cells);
if (reg) { if (reg) {
core_id = of_read_number(reg, addr_cells);
if (core_id == 0 || (is_core_online(core_id))) { if (core_id == 0 || (is_core_online(core_id))) {
val = spin_tbl_addr; val = spin_tbl_addr;
val += id_to_core(core_id) * val += id_to_core(core_id) *