From: Rafał Miłecki Date: Mon, 10 Jul 2023 09:38:23 +0000 (+0200) Subject: kernel: bgmac: fix regressed support for BCM53573 SoCs X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=d54f3b2cfdbd34aa61ca67fd590eebfdf3db51cf;p=openwrt%2Fstaging%2Frobimarko.git kernel: bgmac: fix regressed support for BCM53573 SoCs Signed-off-by: Rafał Miłecki --- diff --git a/target/linux/generic/backport-5.15/735-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch b/target/linux/generic/backport-5.15/735-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch new file mode 100644 index 0000000000..26e9ae3bcd --- /dev/null +++ b/target/linux/generic/backport-5.15/735-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch @@ -0,0 +1,45 @@ +From e7731194fdf085f46d58b1adccfddbd0dfee4873 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Fri, 7 Jul 2023 08:53:25 +0200 +Subject: [PATCH] net: bgmac: postpone turning IRQs off to avoid SoC hangs +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Turning IRQs off is done by accessing Ethernet controller registers. +That can't be done until device's clock is enabled. It results in a SoC +hang otherwise. + +This bug remained unnoticed for years as most bootloaders keep all +Ethernet interfaces turned on. It seems to only affect a niche SoC +family BCM47189. It has two Ethernet controllers but CFE bootloader uses +only the first one. + +Fixes: 34322615cbaa ("net: bgmac: Mask interrupts during probe") +Signed-off-by: Rafał Miłecki +Reviewed-by: Michal Kubiak +Signed-off-by: David S. Miller +--- + drivers/net/ethernet/broadcom/bgmac.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +--- a/drivers/net/ethernet/broadcom/bgmac.c ++++ b/drivers/net/ethernet/broadcom/bgmac.c +@@ -1492,8 +1492,6 @@ int bgmac_enet_probe(struct bgmac *bgmac + + bgmac->in_init = true; + +- bgmac_chip_intrs_off(bgmac); +- + net_dev->irq = bgmac->irq; + SET_NETDEV_DEV(net_dev, bgmac->dev); + dev_set_drvdata(bgmac->dev, bgmac); +@@ -1511,6 +1509,8 @@ int bgmac_enet_probe(struct bgmac *bgmac + */ + bgmac_clk_enable(bgmac, 0); + ++ bgmac_chip_intrs_off(bgmac); ++ + /* This seems to be fixing IRQ by assigning OOB #6 to the core */ + if (!(bgmac->feature_flags & BGMAC_FEAT_IDM_MASK)) { + if (bgmac->feature_flags & BGMAC_FEAT_IRQ_ID_OOB_6) diff --git a/target/linux/generic/backport-6.1/701-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch b/target/linux/generic/backport-6.1/701-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch new file mode 100644 index 0000000000..26e9ae3bcd --- /dev/null +++ b/target/linux/generic/backport-6.1/701-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch @@ -0,0 +1,45 @@ +From e7731194fdf085f46d58b1adccfddbd0dfee4873 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Fri, 7 Jul 2023 08:53:25 +0200 +Subject: [PATCH] net: bgmac: postpone turning IRQs off to avoid SoC hangs +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Turning IRQs off is done by accessing Ethernet controller registers. +That can't be done until device's clock is enabled. It results in a SoC +hang otherwise. + +This bug remained unnoticed for years as most bootloaders keep all +Ethernet interfaces turned on. It seems to only affect a niche SoC +family BCM47189. It has two Ethernet controllers but CFE bootloader uses +only the first one. + +Fixes: 34322615cbaa ("net: bgmac: Mask interrupts during probe") +Signed-off-by: Rafał Miłecki +Reviewed-by: Michal Kubiak +Signed-off-by: David S. Miller +--- + drivers/net/ethernet/broadcom/bgmac.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +--- a/drivers/net/ethernet/broadcom/bgmac.c ++++ b/drivers/net/ethernet/broadcom/bgmac.c +@@ -1492,8 +1492,6 @@ int bgmac_enet_probe(struct bgmac *bgmac + + bgmac->in_init = true; + +- bgmac_chip_intrs_off(bgmac); +- + net_dev->irq = bgmac->irq; + SET_NETDEV_DEV(net_dev, bgmac->dev); + dev_set_drvdata(bgmac->dev, bgmac); +@@ -1511,6 +1509,8 @@ int bgmac_enet_probe(struct bgmac *bgmac + */ + bgmac_clk_enable(bgmac, 0); + ++ bgmac_chip_intrs_off(bgmac); ++ + /* This seems to be fixing IRQ by assigning OOB #6 to the core */ + if (!(bgmac->feature_flags & BGMAC_FEAT_IDM_MASK)) { + if (bgmac->feature_flags & BGMAC_FEAT_IRQ_ID_OOB_6)