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ee67afeda9
This refreshes the patches on top of kernel 5.4.127. Deleted (upstreamed): bcm27xx/patches-5.10/950-0005-Revert-mailbox-avoid-timer-start-from-callback.patch [0] bcm27xx/patches-5.10/950-0678-bcm2711_thermal-Don-t-clamp-temperature-at-zero.patch [1] Needed manual modifications: bcm27xx/patches-5.10/950-0410-drm-atomic-Pass-the-full-state-to-CRTC-atomic-begin-.patch [0]: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.127&id=bb2220e0672b7433a9a42618599cd261b2629240 [1]: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.127&id=83603802954068ccd1b8a3f2ccbbaf5e0862acb0 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
71 lines
2.4 KiB
Diff
71 lines
2.4 KiB
Diff
From eccfde35476213d30a67dedb63f007e7ae8da78c 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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@@ -3253,7 +3253,7 @@ static void bcmgenet_get_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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@@ -3278,6 +3278,14 @@ 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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@@ -3341,8 +3349,8 @@ 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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@@ -4202,7 +4210,7 @@ static int bcmgenet_resume(struct device
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bcmgenet_hfb_create_rxnfc_filter(priv, rule);
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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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