[PATCH] powerpc/powernv: delay rng of node creation until later in boot

[Sachin Sant]

> On 30-Jun-2022, at 5:46 PM, Jason A. Donenfeld <Jason at zx2c4.com> wrote:
> 
> The of node for the rng must be created much later in boot. Otherwise it
> tries to connect to a parent that doesn't yet exist, resulting on this
> splat:
> 
> [    0.000478] kobject: '(null)' ((____ptrval____)): is not initialized, yet kobject_get() is being called.
> [    0.002925] [c000000002a0fb30] [c00000000073b0bc] kobject_get+0x8c/0x100 (unreliable)
> [    0.003071] [c000000002a0fba0] [c00000000087e464] device_add+0xf4/0xb00
> [    0.003194] [c000000002a0fc80] [c000000000a7f6e4] of_device_add+0x64/0x80
> [    0.003321] [c000000002a0fcb0] [c000000000a800d0] of_platform_device_create_pdata+0xd0/0x1b0
> [    0.003476] [c000000002a0fd00] [c00000000201fa44] pnv_get_random_long_early+0x240/0x2e4
> [    0.003623] [c000000002a0fe20] [c000000002060c38] random_init+0xc0/0x214
> 
> This patch fixes the issue by doing the of node creation inside of
> machine_subsys_initcall.
> 
> Fixes: f3eac426657d ("powerpc/powernv: wire up rng during setup_arch")
> Cc: stable at vger.kernel.org
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Reported-by: Sachin Sant <sachinp at linux.ibm.com>
> Signed-off-by: Jason A. Donenfeld <Jason at zx2c4.com>
> ---

Thanks Jason for the patch. This fixes the reported problem for me.

Tested-by: Sachin Sant <sachinp at linux.ibm.com>

- Sachin