| Message ID | 20241220093907.2747601-1-quic_ylal@quicinc.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] irqchip: gic-v3: Handle failure case of CPU enters low power state | expand |
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index c19083bfb943..2a99ca5c3f1d 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -1495,7 +1495,7 @@ static int gic_retrigger(struct irq_data *data) static int gic_cpu_pm_notifier(struct notifier_block *self, unsigned long cmd, void *v) { - if (cmd == CPU_PM_EXIT) { + if (cmd == CPU_PM_EXIT || cmd == CPU_PM_ENTER_FAILED) { if (gic_dist_security_disabled()) gic_enable_redist(true); gic_cpu_sys_reg_init();
Adding a new condition in gic_cpu_pm_notifier to address instances where the CPU fails to enter low power mode (CPU_PM_ENTER_FAILED). The CPU_PM framework signals CPU_PM_ENTER_FAILED upon such failures. When the CPU attempts to enter low power mode, it disables the redistributor and Group 1 interrupts and reinitializes the system registers upon wakeup. In case of failure while entering low power mode, it is necessary to re-enable the redistributor and Group 1 interrupts to restore normal operation. Signed-off-by: Yogesh Lal <quic_ylal@quicinc.com> --- drivers/irqchip/irq-gic-v3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- Changes in V2: * Updating the commit message * Link to V1: https://lore.kernel.org/all/1671734140-15935-1-git-send-email-quic_ylal@quicinc.com/ ---