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c6ddf8d502
Many changes were done in drivers/pinctrl/bcm/pinctrl-bcm2835.c between
5.4.171 and 5.4.179.
The following 3 patches do not apply any more:
* target/linux/bcm27xx/patches-5.4/950-0316-pinctrl-bcm2835-Add-support-for-BCM2711-pull-up-func.patch
This was already integrated in kernel v5.4-rc1, it was never needed.
* target/linux/bcm27xx/patches-5.4/950-0328-Revert-pinctrl-bcm2835-Pass-irqchip-when-adding-gpio.patch
* target/linux/bcm27xx/patches-5.4/950-0362-pinctrl-bcm2835-Change-init-order-for-gpio-hogs.patch
I think these were done to fix the problem which was really fixed in
commit 75278f1aff5e ("pinctrl: bcm2835: Change init order for gpio
hogs") from v5.4.175
target/linux/generic/backport-5.4/716-v5.5-net-sfp-move-fwnode-parsing-into-sfp-bus-layer.patch
Move fwnode_device_is_available to the same position as in kernel 5.10.
target/linux/layerscape/patches-5.4/302-dts-0083-arm64-ls1028a-qds-correct-bus-of-rtc.patch
Applied in commit 65816c1034769e714edb70f59a33bc5472d9e55f ("arm64: dts:
ls1028a-qds: move rtc node to the correct i2c bus")
Compile-tested: lantiq/xrx200, bcm27xx/bcm2710
Run-tested: lantiq/xrx200
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
71 lines
2.4 KiB
Diff
71 lines
2.4 KiB
Diff
From 507c4d749a1bbc3eb5c364dda61ac6bf95026cf1 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Fri, 25 Sep 2020 15:07:23 +0100
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Subject: [PATCH] net: bcmgenet: Reset RBUF on first open
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If the RBUF logic is not reset when the kernel starts then there
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may be some data left over from any network boot loader. If the
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64-byte packet headers are enabled then this can be fatal.
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Extend bcmgenet_dma_disable to do perform the reset, but not when
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called from bcmgenet_resume in order to preserve a wake packet.
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N.B. This different handling of resume is just based on a hunch -
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why else wouldn't one reset the RBUF as well as the TBUF? If this
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isn't the case then it's easy to change the patch to make the RBUF
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reset unconditional.
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See: https://github.com/raspberrypi/linux/issues/3850
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/net/ethernet/broadcom/genet/bcmgenet.c | 16 ++++++++++++----
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1 file changed, 12 insertions(+), 4 deletions(-)
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--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
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+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
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@@ -2791,7 +2791,7 @@ static void bcmgenet_set_hw_addr(struct
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}
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/* Returns a reusable dma control register value */
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-static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv)
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+static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv, bool flush_rx)
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{
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unsigned int i;
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u32 reg;
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@@ -2816,6 +2816,14 @@ static u32 bcmgenet_dma_disable(struct b
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udelay(10);
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bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH);
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+ if (flush_rx) {
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+ reg = bcmgenet_rbuf_ctrl_get(priv);
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+ bcmgenet_rbuf_ctrl_set(priv, reg | BIT(0));
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+ udelay(10);
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+ bcmgenet_rbuf_ctrl_set(priv, reg);
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+ udelay(10);
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+ }
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+
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return dma_ctrl;
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}
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@@ -2911,8 +2919,8 @@ static int bcmgenet_open(struct net_devi
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bcmgenet_set_hw_addr(priv, dev->dev_addr);
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- /* Disable RX/TX DMA and flush TX queues */
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- dma_ctrl = bcmgenet_dma_disable(priv);
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+ /* Disable RX/TX DMA and flush TX and RX queues */
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+ dma_ctrl = bcmgenet_dma_disable(priv, true);
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/* Reinitialize TDMA and RDMA and SW housekeeping */
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ret = bcmgenet_init_dma(priv);
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@@ -3667,7 +3675,7 @@ static int bcmgenet_resume(struct device
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bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
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/* Disable RX/TX DMA and flush TX queues */
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- dma_ctrl = bcmgenet_dma_disable(priv);
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+ dma_ctrl = bcmgenet_dma_disable(priv, false);
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/* Reinitialize TDMA and RDMA and SW housekeeping */
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ret = bcmgenet_init_dma(priv);
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