This is a backport of commit 34fc9cc3aebe to v5.15.
The "PolarFire SoC MSS Technical Reference Manual" documents the
following PLIC interrupts:
1 - L2 Cache Controller Signals when a metadata correction event occurs
2 - L2 Cache Controller Signals when an uncorrectable metadata event occurs
3 - L2 Cache Controller Signals when a data correction event occurs
4 - L2 Cache Controller Signals when an uncorrectable data event occurs
This differs from the SiFive FU540 which only has three L2 cache related
interrupts.
The sequence in the device tree is defined by an enum:
enum {
DIR_CORR = 0,
DATA_CORR,
DATA_UNCORR,
DIR_UNCORR,
};
So the correct sequence of the L2 cache interrupts is
interrupts = <1>, <3>, <4>, <2>;
This manifests as an unusable system if the l2-cache driver is enabled,
as the wrong interrupt gets cleared & the handler prints errors to the
console ad infinitum.
Fixes: 0fa6107eca41 ("RISC-V: Initial DTS for Microchip ICICLE board")
CC: stable(a)vger.kernel.org # 5.15: e35b07a7df9b: riscv: dts: microchip: mpfs: Group tuples in interrupt properties
Link: https://lore.kernel.org/all/20220817132521.3159388-1-heinrich.schuchardt@ca…
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt(a)canonical.com>
---
arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
index 4ef4bcb74872..57989b2ac186 100644
--- a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
+++ b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
@@ -153,7 +153,7 @@ cache-controller@2010000 {
cache-size = <2097152>;
cache-unified;
interrupt-parent = <&plic>;
- interrupts = <1 2 3>;
+ interrupts = <1>, <3>, <4>, <2>;
reg = <0x0 0x2010000 0x0 0x1000>;
};
--
2.37.2
This bug is marked as fixed by commit:
net: core: netlink: add helper refcount dec and lock function
net: sched: add helper function to take reference to Qdisc
net: sched: extend Qdisc with rcu
net: sched: rename qdisc_destroy() to qdisc_put()
net: sched: use Qdisc rcu API instead of relying on rtnl lock
But I can't find it in any tested tree for more than 90 days.
Is it a correct commit? Please update it by replying:
#syz fix: exact-commit-title
Until then the bug is still considered open and
new crashes with the same signature are ignored.