[powerpc][5.13.0-next20210629] Kernel WARN crypto/testmgr.c:5653 during boot

[Sachin Sant]

While booting 5.13.0-next20210629 on a Power server, following
warning is seen:

[    0.076955] DRBG: could not allocate digest TFM handle: hmac(sha512)
[    0.076960] alg: drbg: Failed to reset rng
[    0.076963] alg: drbg: Test 0 failed for drbg_nopr_hmac_sha512
[    0.076967] ------------[ cut here ]------------
[    0.076970] alg: self-tests for drbg_nopr_hmac_sha512 (stdrng) failed (rc=-22)
[    0.076977] WARNING: CPU: 10 PID: 153 at crypto/testmgr.c:5653 alg_test+0x484/0x860
[    0.076989] Modules linked in:
[    0.076993] CPU: 10 PID: 153 Comm: cryptomgr_test Not tainted 5.13.0-next-20210629 #1
[    0.076998] NIP:  c00000000063ea44 LR: c00000000063ea40 CTR: c000000000730b40
[    0.077003] REGS: c00000000e7ff960 TRAP: 0700   Not tainted  (5.13.0-next-20210629)
[    0.077007] MSR:  8000000000029033 <SF,EE,ME,IR,DR,RI,LE>  CR: 28008222  XER: 20040005
[    0.077018] CFAR: c000000000150a00 IRQMASK: 0 
[    0.077018] GPR00: c00000000063ea40 c00000000e7ffc00 c0000000029bc300 0000000000000042 
[    0.077018] GPR04: 00000000ffff7fff c00000000e7ff8c0 c00000000e7ff8b8 0000000000000000 
[    0.077018] GPR08: 00000009f98e0000 c0000000024f66f0 c0000000024f66f0 c000000002876838 
[    0.077018] GPR12: 0000000000008000 c00000001ec7a280 c00000000018ce88 c000000003b300c0 
[    0.077018] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 
[    0.077018] GPR20: 0000000000000000 0000000000000000 c000000002a9ab20 c000000000fb5278 
[    0.077018] GPR24: c000000010a85200 c000000000d61fa8 c000000010a85280 0000000000000400 
[    0.077018] GPR28: c000000010a85200 000000000000000c c000000002ccf230 ffffffffffffffea 
[    0.077072] NIP [c00000000063ea44] alg_test+0x484/0x860
[    0.077077] LR [c00000000063ea40] alg_test+0x480/0x860
[    0.077082] Call Trace:
[    0.077085] [c00000000e7ffc00] [c00000000063ea40] alg_test+0x480/0x860 (unreliable)
[    0.077091] [c00000000e7ffd70] [c00000000063ca60] cryptomgr_test+0x40/0x70
[    0.077097] [c00000000e7ffda0] [c00000000018d014] kthread+0x194/0x1a0
[    0.077103] [c00000000e7ffe10] [c00000000000c750] ret_from_kernel_thread+0x5c/0x6c
[    0.077110] Instruction dump:
[    0.077113] 409e0298 3d220031 89292f56 2f890000 409e0288 3c62fe63 7f45d378 7f84e378 
[    0.077121] 7fe6fb78 38633260 4bb11f5d 60000000 <0fe00000> e8010180 eb210138 7c0803a6 
[    0.077131] ---[ end trace a1cc3999f90f0962 ]---
[    0.077585] iommu: Default domain type: Translated 

This new self test was introduced with
commit 8833272d876e
         crypto: drbg - self test for HMAC(SHA-512)

Thanks
-Sachin