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authorRafał Miłecki <rafal@milecki.pl>2023-07-10 11:38:23 +0200
committerRafał Miłecki <rafal@milecki.pl>2023-07-10 12:54:53 +0200
commita210fced85b9d052580084802c7dfe9243901452 (patch)
tree923fa6e9e0a140aa7745d8084ea14a6be713b9bd /target/linux/generic
parente341d51e0655e8d1442676181e136364eb090c11 (diff)
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kernel: bgmac: fix regressed support for BCM53573 SoCs
Signed-off-by: Rafał Miłecki <rafal@milecki.pl> (cherry picked from commit d54f3b2cfdbd34aa61ca67fd590eebfdf3db51cf)
Diffstat (limited to 'target/linux/generic')
-rw-r--r--target/linux/generic/backport-5.15/735-v6.5-net-bgmac-postpone-turning-IRQs-off-to-avoid-SoC-han.patch45
1 files changed, 45 insertions, 0 deletions
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?= <rafal@milecki.pl>
+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 <rafal@milecki.pl>
+Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ 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)