Random number generator hangs for a long time

[loki-amorf]

Hi,
I've built a yocto (warrior) (console-image) using meta-somlabs layers.
The kernel was used: 5.0.7

All layers comes from the warrior branches.
My problem is that when I boot, the boot time is long.

[ 9.120451] rtc rtc0: Timeout trying to get valid LPSRT Counter read
hwclock: settimeofday() failed: Invalid argument
Wed May 27 12:52:26 UTC 2020
[ 11.569532] urandom_read: 1 callbacks suppressed
[ 11.569551] random: dd: uninitialized urandom read (512 bytes read)
ALSA: Restoring mixer settings...
INIT: Entering runlevel: 5
/usr/sbin/alsactl: load_state:1735: No soundcards found...
Configuring network interfaces...
[ 12.142003] Micrel KSZ8081 or KSZ8091 2188000.ethernet-1:01: attached PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=2188000.ethernet-1:01, irq=POLL)
done.
Starting random number generator daemon
Initalizing available sources

Failed to init entropy source hwrng

Enabling JITTER rng support

Initalizing entropy source jitter

[ 35.018506] random: crng init done

I guess, I have problem with hwrng and this problem seems happen often.

After that I've found solution for similair board:
MLK-13074 dts: mx6ull: enable hardware RNG for i.mx6ull
https://git.isee.biz/linux-kernel/linux-imx/commit/d427888bd72d94485c2590f22250d5d23721d380#b3b659238db87e67a85890cd6e461b0caf558f9d

I've changed .dtsi file but it didnt help.

			rngb: rngb@02284000 {
				compatible = "fsl,imx6sl-rng", "fsl,imx-rng", "imx-rng";
				reg = <0x02284000 0x4000>;
				interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
				clocks =  <&clks IMX6UL_CLK_DUMMY>;
			};

Do you guys have any idea how to resolve this problem?

[marcinbis]

Hi,
I'll investigate this problem further.
Meanwhile, make sure, you have rng-tools included in your image.
This will build rngd which initilaizes random seed at boot.

[loki-amorf]

On Thu, 28 May 2020 at 15:41, Marcin Bis ***@***.***> wrote: Hi, I'll investigate this problem further. Meanwhile, make sure, you have *rng-tools* included in your image. This will build rngd which initilaizes random seed at boot. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#7 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACXOLE2KNGCD2JUTWO5RS43RTZLWFANCNFSM4NNBGFDA> .

Yes. rng-tools has already included.