Update Linux to v5.4.148
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.148.tar.gz
Change-Id: Ib3d26c5ba9b022e2e03533005c4fed4d7c30b61b
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 1753486..918fe05 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -194,9 +194,9 @@
set_bit(IRQTF_AFFINITY, &action->thread_flags);
}
+#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
static void irq_validate_effective_affinity(struct irq_data *data)
{
-#ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
const struct cpumask *m = irq_data_get_effective_affinity_mask(data);
struct irq_chip *chip = irq_data_get_irq_chip(data);
@@ -204,9 +204,19 @@
return;
pr_warn_once("irq_chip %s did not update eff. affinity mask of irq %u\n",
chip->name, data->irq);
-#endif
}
+static inline void irq_init_effective_affinity(struct irq_data *data,
+ const struct cpumask *mask)
+{
+ cpumask_copy(irq_data_get_effective_affinity_mask(data), mask);
+}
+#else
+static inline void irq_validate_effective_affinity(struct irq_data *data) { }
+static inline void irq_init_effective_affinity(struct irq_data *data,
+ const struct cpumask *mask) { }
+#endif
+
int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
bool force)
{
@@ -265,6 +275,30 @@
return ret;
}
+static bool irq_set_affinity_deactivated(struct irq_data *data,
+ const struct cpumask *mask, bool force)
+{
+ struct irq_desc *desc = irq_data_to_desc(data);
+
+ /*
+ * Handle irq chips which can handle affinity only in activated
+ * state correctly
+ *
+ * If the interrupt is not yet activated, just store the affinity
+ * mask and do not call the chip driver at all. On activation the
+ * driver has to make sure anyway that the interrupt is in a
+ * useable state so startup works.
+ */
+ if (!IS_ENABLED(CONFIG_IRQ_DOMAIN_HIERARCHY) ||
+ irqd_is_activated(data) || !irqd_affinity_on_activate(data))
+ return false;
+
+ cpumask_copy(desc->irq_common_data.affinity, mask);
+ irq_init_effective_affinity(data, mask);
+ irqd_set(data, IRQD_AFFINITY_SET);
+ return true;
+}
+
int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask,
bool force)
{
@@ -275,6 +309,9 @@
if (!chip || !chip->irq_set_affinity)
return -EINVAL;
+ if (irq_set_affinity_deactivated(data, mask, force))
+ return 0;
+
if (irq_can_move_pcntxt(data) && !irqd_is_setaffinity_pending(data)) {
ret = irq_try_set_affinity(data, mask, force);
} else {
@@ -284,7 +321,11 @@
if (desc->affinity_notify) {
kref_get(&desc->affinity_notify->kref);
- schedule_work(&desc->affinity_notify->work);
+ if (!schedule_work(&desc->affinity_notify->work)) {
+ /* Work was already scheduled, drop our extra ref */
+ kref_put(&desc->affinity_notify->kref,
+ desc->affinity_notify->release);
+ }
}
irqd_set(data, IRQD_AFFINITY_SET);
@@ -384,7 +425,10 @@
raw_spin_unlock_irqrestore(&desc->lock, flags);
if (old_notify) {
- cancel_work_sync(&old_notify->work);
+ if (cancel_work_sync(&old_notify->work)) {
+ /* Pending work had a ref, put that one too */
+ kref_put(&old_notify->kref, old_notify->release);
+ }
kref_put(&old_notify->kref, old_notify->release);
}
@@ -442,23 +486,9 @@
{
return irq_select_affinity(irq_desc_get_irq(desc));
}
-#endif
+#endif /* CONFIG_AUTO_IRQ_AFFINITY */
+#endif /* CONFIG_SMP */
-/*
- * Called when a bogus affinity is set via /proc/irq
- */
-int irq_select_affinity_usr(unsigned int irq)
-{
- struct irq_desc *desc = irq_to_desc(irq);
- unsigned long flags;
- int ret;
-
- raw_spin_lock_irqsave(&desc->lock, flags);
- ret = irq_setup_affinity(desc);
- raw_spin_unlock_irqrestore(&desc->lock, flags);
- return ret;
-}
-#endif
/**
* irq_set_vcpu_affinity - Set vcpu affinity for the interrupt
@@ -996,11 +1026,15 @@
irqreturn_t ret;
local_bh_disable();
+ if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ local_irq_disable();
ret = action->thread_fn(action->irq, action->dev_id);
if (ret == IRQ_HANDLED)
atomic_inc(&desc->threads_handled);
irq_finalize_oneshot(desc, action);
+ if (!IS_ENABLED(CONFIG_PREEMPT_RT))
+ local_irq_enable();
local_bh_enable();
return ret;
}