Hi Paul,
On 03.12.19 16:46, Paul Kocialkowski wrote:
The serial# environment variable is a read-only special variable, that can only be set once. As a result, if the environment was saved to a persistent storage location, attempting to set it again in rockchip_cpuid_set will fail and halt the boot with the following error:
Solve this by checking whether the variable is already set before.
Signed-off-by: Paul Kocialkowski paul.kocialkowski@bootlin.com
it looks like we're fixing the same problems a lot. Yesterday I also got a patch from Miquel about the px30 iommu clocks ;-) .
Here it's the same as "rockchip: misc: protect serial# from getting overwritten" from november 29 ;-)
Heiko
arch/arm/mach-rockchip/misc.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/arch/arm/mach-rockchip/misc.c b/arch/arm/mach-rockchip/misc.c index bed4317f7ece..a0c6a1c0b266 100644 --- a/arch/arm/mach-rockchip/misc.c +++ b/arch/arm/mach-rockchip/misc.c @@ -108,12 +108,16 @@ int rockchip_cpuid_set(const u8 *cpuid, const u32 cpuid_length) high[i] = cpuid[i << 1]; }
- serialno = crc32_no_comp(0, low, 8);
- serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
- snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno);
- env_set("cpuid#", cpuid_str);
- env_set("serial#", serialno_str);
if (!env_get("serial#")) {
serialno = crc32_no_comp(0, low, 8);serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;snprintf(serialno_str, sizeof(serialno_str), "%016llx",serialno);env_set("serial#", serialno_str);}
return 0; }