diff --git a/target/linux/realtek/patches-6.12/302-6.17-irqchip-mips-gic-forced-affinity.patch b/target/linux/realtek/patches-6.12/302-6.17-irqchip-mips-gic-forced-affinity.patch new file mode 100644 index 00000000000..cf04d60703b --- /dev/null +++ b/target/linux/realtek/patches-6.12/302-6.17-irqchip-mips-gic-forced-affinity.patch @@ -0,0 +1,47 @@ +From 2250db8628a0d8293ad2e0671138b848a185fba1 Mon Sep 17 00:00:00 2001 +From: Markus Stockhausen +Date: Sat, 21 Jun 2025 01:49:51 -0400 +Subject: irqchip/mips-gic: Allow forced affinity + +Devices of the Realtek MIPS Otto platform use the official rtl-otto-timer +as clock event generator and CPU clocksource. It is registered for each CPU +startup via cpuhp_setup_state() and forces the affinity of the clockevent +interrupts to the appropriate CPU via irq_force_affinity(). + +On the "smaller" devices with a vendor specific interrupt controller +(supported by irq-realtek-rtl) the registration works fine. The "larger" +RTL931x series is based on a MIPS interAptiv dual core with a MIPS GIC +controller. Interrupt routing setup is cancelled because gic_set_affinity() +does not accept the current (not yet online) CPU as a target. + +Relax the checks by evaluating the force parameter that is provided for +exactly this purpose like in other drivers. With this the affinity can be +set as follows: + + - force = false: allow to set affinity to any online cpu + - force = true: allow to set affinity to any cpu + +Co-developed-by: Sebastian Gottschall +Signed-off-by: Sebastian Gottschall +Signed-off-by: Markus Stockhausen +Signed-off-by: Thomas Gleixner +Link: https://lore.kernel.org/all/20250621054952.380374-1-markus.stockhausen@gmx.de +--- + drivers/irqchip/irq-mips-gic.c | 8 ++++++-- + 1 file changed, 6 insertions(+), 2 deletions(-) + +--- a/drivers/irqchip/irq-mips-gic.c ++++ b/drivers/irqchip/irq-mips-gic.c +@@ -263,7 +263,11 @@ static int gic_set_affinity(struct irq_d + unsigned long flags; + unsigned int cpu; + +- cpu = cpumask_first_and(cpumask, cpu_online_mask); ++ if (force) ++ cpu = cpumask_first(cpumask); ++ else ++ cpu = cpumask_first_and(cpumask, cpu_online_mask); ++ + if (cpu >= NR_CPUS) + return -EINVAL; +