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openwrt/target/linux/bcm27xx/patches-6.6/950-0076-bcm2835-rng-Avoid-initialising-if-already-enabled.patch
John Audia 51db334005 kernel: bump 6.6 to 6.6.54
Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.54

Removed upstreamed:
	generic/backport-6.6/780-24-v6.12-r8169-disable-ALDPS-per-default-for-RTL8125.patch[1]
	generic/pending-6.6/360-selftests-bpf-portability-of-unprivileged-tests.patch[2]

Manually rebased:
	bcm53xx/patches-6.6/180-usb-xhci-add-support-for-performing-fake-doorbell.patch
	bmips/patches-6.6/200-mips-bmips-automatically-detect-CPU-frequency.patch

All other patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.54&id=50d062b6cc90c45a0de54e9bd9903c82777d66bf
2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.54&id=103c0431c7fb4790affea121126840dbfb146341

Build system: x86/64
Build-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3
Run-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3

Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/16602
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2024-10-05 12:43:51 +02:00

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Diff

From bf03fa485094a2483bad7d27537f532d04e8d860 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Tue, 6 Dec 2016 17:05:39 +0000
Subject: [PATCH 0076/1085] bcm2835-rng: Avoid initialising if already enabled
Avoids the 0x40000 cycles of warmup again if firmware has already used it
---
drivers/char/hw_random/bcm2835-rng.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/char/hw_random/bcm2835-rng.c
+++ b/drivers/char/hw_random/bcm2835-rng.c
@@ -107,8 +107,10 @@ static int bcm2835_rng_init(struct hwrng
}
/* set warm-up count & enable */
- rng_writel(priv, RNG_WARMUP_COUNT, RNG_STATUS);
- rng_writel(priv, RNG_RBGEN, RNG_CTRL);
+ if (!(rng_readl(priv, RNG_CTRL) & RNG_RBGEN)) {
+ rng_writel(priv, RNG_WARMUP_COUNT, RNG_STATUS);
+ rng_writel(priv, RNG_RBGEN, RNG_CTRL);
+ }
return ret;
}