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46 lines
1.6 KiB
Diff
46 lines
1.6 KiB
Diff
From e7731194fdf085f46d58b1adccfddbd0dfee4873 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Fri, 7 Jul 2023 08:53:25 +0200
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Subject: [PATCH] net: bgmac: postpone turning IRQs off to avoid SoC hangs
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Turning IRQs off is done by accessing Ethernet controller registers.
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That can't be done until device's clock is enabled. It results in a SoC
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hang otherwise.
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This bug remained unnoticed for years as most bootloaders keep all
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Ethernet interfaces turned on. It seems to only affect a niche SoC
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family BCM47189. It has two Ethernet controllers but CFE bootloader uses
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only the first one.
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Fixes: 34322615cbaa ("net: bgmac: Mask interrupts during probe")
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/broadcom/bgmac.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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--- a/drivers/net/ethernet/broadcom/bgmac.c
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+++ b/drivers/net/ethernet/broadcom/bgmac.c
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@@ -1492,8 +1492,6 @@ int bgmac_enet_probe(struct bgmac *bgmac
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bgmac->in_init = true;
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- bgmac_chip_intrs_off(bgmac);
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-
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net_dev->irq = bgmac->irq;
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SET_NETDEV_DEV(net_dev, bgmac->dev);
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dev_set_drvdata(bgmac->dev, bgmac);
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@@ -1511,6 +1509,8 @@ int bgmac_enet_probe(struct bgmac *bgmac
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*/
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bgmac_clk_enable(bgmac, 0);
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+ bgmac_chip_intrs_off(bgmac);
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+
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/* This seems to be fixing IRQ by assigning OOB #6 to the core */
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if (!(bgmac->feature_flags & BGMAC_FEAT_IDM_MASK)) {
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if (bgmac->feature_flags & BGMAC_FEAT_IRQ_ID_OOB_6)
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