diff options
| author | Rafał Miłecki <rafal@milecki.pl> | 2023-07-07 09:53:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-07-08 12:02:15 +0300 |
| commit | e7731194fdf085f46d58b1adccfddbd0dfee4873 (patch) | |
| tree | 37509c1598a9f44db9c0b1fb89c984991e0bbe8d /drivers/net | |
| parent | 8139dccd464aaee4a2c351506ff883733c6ca5a3 (diff) | |
| download | linux-e7731194fdf085f46d58b1adccfddbd0dfee4873.tar.xz | |
net: bgmac: postpone turning IRQs off to avoid SoC hangs
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bgmac.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c index 1761df8fb7f9..10c7c232cc4e 100644 --- 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) |