openwrt/target/linux/ramips/patches-5.15/324-mt7621-perfctr-fix.patch
Felix Fietkau a3764ee29d ramips: add linux 5.15 support for mt7621
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-03-27 21:36:40 +02:00

16 lines
355 B
Diff

--- a/arch/mips/ralink/irq-gic.c
+++ b/arch/mips/ralink/irq-gic.c
@@ -13,6 +13,12 @@
int get_c0_perfcount_int(void)
{
+ /*
+ * Performance counter events are routed through GIC.
+ * Prevent them from firing on CPU IRQ7 as well
+ */
+ clear_c0_status(IE_SW0 << 7);
+
return gic_get_c0_perfcount_int();
}
EXPORT_SYMBOL_GPL(get_c0_perfcount_int);