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| author | Marc Zyngier <maz@kernel.org> | 2024-02-20 11:47:31 +0000 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-20 17:30:57 +0100 |
| commit | 5aa3c0cf5bba6437c9e63a56f684f61de8b503d6 (patch) | |
| tree | 8d3cf4f073755bde8ce821225c80d40322f79d85 /kernel/irq | |
| parent | 34da27aa8956d3a75c7556a59c9c7cfd0b3f18ab (diff) | |
| download | linux-5aa3c0cf5bba6437c9e63a56f684f61de8b503d6.tar.gz linux-5aa3c0cf5bba6437c9e63a56f684f61de8b503d6.tar.bz2 linux-5aa3c0cf5bba6437c9e63a56f684f61de8b503d6.zip | |
genirq/irqdomain: Don't call ops->select for DOMAIN_BUS_ANY tokens
Users of the IRQCHIP_PLATFORM_DRIVER_{BEGIN,END} helpers rely on a fwspec
containing only the fwnode (and crucially a number of parameters set to 0)
together with a DOMAIN_BUS_ANY token to check whether a parent irqchip has
probed and registered a domain.
Since de1ff306dcf4 ("genirq/irqdomain: Remove the param count restriction
from select()"), ops->select() is called unconditionally, meaning that
irqchips implementing select() now need to handle ANY as a match.
Instead of adding more esoteric checks to the individual drivers, add that
condition to irq_find_matching_fwspec(), and let it handle the corner case,
as per the comment in the function.
This restores the functionality of the above helpers.
Fixes: de1ff306dcf4 ("genirq/irqdomain: Remove the param count restriction from select()")
Reported-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reported-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20240220114731.1898534-1-maz@kernel.org
Link: https://lore.kernel.org/r/20240219-gic-fix-child-domain-v1-1-09f8fd2d9a8f@linaro.org
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/irqdomain.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index aeb41655d6de..3dd1c871e091 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -449,7 +449,7 @@ struct irq_domain *irq_find_matching_fwspec(struct irq_fwspec *fwspec, */ mutex_lock(&irq_domain_mutex); list_for_each_entry(h, &irq_domain_list, link) { - if (h->ops->select) + if (h->ops->select && bus_token != DOMAIN_BUS_ANY) rc = h->ops->select(h, fwspec, bus_token); else if (h->ops->match) rc = h->ops->match(h, to_of_node(fwnode), bus_token); |