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powerpc/prom: Remove VLA in prom_check_platform_support()

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In prom_check_platform_support() we retrieve and parse the
"ibm,arch-vec-5-platform-support" property of the chosen node.
Currently we use a variable length array however to avoid this use an
array of constant length 8.

This property is used to indicate the supported options of vector 5
bytes 23-26 of the ibm,architecture.vec node. Each of these options
is a pair of bytes, thus for 4 options we have a max length of 8 bytes.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Suraj Jitindar Singh 2018-09-05 12:09:50 +10:00 committed by Michael Ellerman
parent e00d93ac9a
commit ab91239942
1 changed files with 5 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

7
arch/powerpc/kernel/prom_init.c
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@ -1131,12 +1131,15 @@ static void __init prom_check_platform_support(void)
"ibm,arch-vec-5-platform-support");
if (prop_len > 1) {
int i;
u8 vec[prop_len];
u8 vec[8];
prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
prop_len);
if (prop_len > sizeof(vec))
prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
prop_len);
prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support",
&vec, sizeof(vec));
for (i = 0; i < prop_len; i += 2) {
for (i = 0; i < sizeof(vec); i += 2) {
prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2
, vec[i]
, vec[i + 1]);