openwrt/target/linux/bcm27xx/patches-5.15/950-0047-bcm2835-rng-Avoid-initialising-if-already-enabled.patch
Hauke Mehrtens b389c3d66f kernel: bump 5.15 to 5.15.168
Manually adapted:
   bcm27xx/patches-5.15/950-0166-xhci-Use-more-event-ring-segment-table-entries.patch
     I replaced it with the version from main branch which applies more easily
   bcm27xx/patches-5.15/950-0600-xhci-quirks-add-link-TRB-quirk-for-VL805.patch
   bcm27xx/patches-5.15/950-0605-xhci-refactor-out-TRBS_PER_SEGMENT-define-in-runtime.patch
   bcm27xx/patches-5.15/950-0606-usb-xhci-add-VLI_TRB_CACHE_BUG-quirk.patch
   bcm27xx/patches-5.15/950-0717-usb-xhci-add-a-quirk-for-Superspeed-bulk-OUT-transfe.patch
   bcm53xx/patches-5.15/180-usb-xhci-add-support-for-performing-fake-doorbell.patch
   generic/hack-5.15/645-netfilter-connmark-introduce-set-dscpmark.patch

Added patch:
   generic/backport-5.15/777-netfilter-xtables-fix-typo-causing-some-targets-to-not-load-on-IPv6.patch
      This fixes a bug intoduced in this version.

Adapt kernel configuration for newly added option
CONFIG_PROC_MEM_ALWAYS_FORCE.

Link: https://github.com/openwrt/openwrt/pull/16882
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2024-11-16 00:03:52 +01:00

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840 B
Diff

From d7e520c88cb8e7025c93c809350794711fc94f52 Mon Sep 17 00:00:00 2001
From: popcornmix <popcornmix@gmail.com>
Date: Tue, 6 Dec 2016 17:05:39 +0000
Subject: [PATCH] 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
@@ -108,8 +108,10 @@ 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;
}