6.11-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matti Vaittinen <mazziesaccount@xxxxxxxxx> commit 24d02c4e53e2f02da16b2ae8a1bc92553110ca25 upstream. The unification of irq_domain_create_legacy() missed the fact that interrupts must be associated even when the Linux interrupt number provided in the first_irq argument is 0. This breaks all call sites of irq_domain_create_legacy() which supply 0 as the first_irq argument. Enforce the association for legacy domains in __irq_domain_instantiate() to cure this. [ tglx: Massaged it slightly. ] Fixes: 70114e7f7585 ("irqdomain: Simplify simple and legacy domain creation") Reported-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> Signed-off-by Matti Vaittinen <mazziesaccount@xxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Tested-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> Link: https://lore.kernel.org/all/c3379142-10bc-4f14-b8ac-a46927aeac38@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/irq/irqdomain.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -300,7 +300,7 @@ static void irq_domain_instantiate_descs } static struct irq_domain *__irq_domain_instantiate(const struct irq_domain_info *info, - bool cond_alloc_descs) + bool cond_alloc_descs, bool force_associate) { struct irq_domain *domain; int err; @@ -336,8 +336,12 @@ static struct irq_domain *__irq_domain_i if (cond_alloc_descs && info->virq_base > 0) irq_domain_instantiate_descs(info); - /* Legacy interrupt domains have a fixed Linux interrupt number */ - if (info->virq_base > 0) { + /* + * Legacy interrupt domains have a fixed Linux interrupt number + * associated. Other interrupt domains can request association by + * providing a Linux interrupt number > 0. + */ + if (force_associate || info->virq_base > 0) { irq_domain_associate_many(domain, info->virq_base, info->hwirq_base, info->size - info->hwirq_base); } @@ -360,7 +364,7 @@ err_domain_free: */ struct irq_domain *irq_domain_instantiate(const struct irq_domain_info *info) { - return __irq_domain_instantiate(info, false); + return __irq_domain_instantiate(info, false, false); } EXPORT_SYMBOL_GPL(irq_domain_instantiate); @@ -464,7 +468,7 @@ struct irq_domain *irq_domain_create_sim .ops = ops, .host_data = host_data, }; - struct irq_domain *domain = __irq_domain_instantiate(&info, true); + struct irq_domain *domain = __irq_domain_instantiate(&info, true, false); return IS_ERR(domain) ? NULL : domain; } @@ -513,7 +517,7 @@ struct irq_domain *irq_domain_create_leg .ops = ops, .host_data = host_data, }; - struct irq_domain *domain = irq_domain_instantiate(&info); + struct irq_domain *domain = __irq_domain_instantiate(&info, false, true); return IS_ERR(domain) ? NULL : domain; }