android/android_kernel_samsung_sm8650
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: bgmac: postpone turning IRQs off to avoid SoC hangs

Browse Source 
[ Upstream commit e7731194fdf085f46d58b1adccfddbd0dfee4873 ]

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: 34322615cb ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rafał Miłecki 2023-07-07 08:53:25 +02:00 committed by Greg Kroah-Hartman
parent dc47046675
commit 685b57a122
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/broadcom/bgmac.c
View File

@ -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)