irqchip/renesas-rzg2l: Clear the shared interrupt bit in rzg2l_irqc_free()

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rzg2l_irqc_free() invokes irq_domain_free_irqs_common(), which internally
calls irq_domain_reset_irq_data(). That explicitly sets irq_data->hwirq to
0. Consequently, irqd_to_hwirq(d) returns 0 when called after it.

Since 0 falls outside the valid shared IRQ ranges,
rzg2l_irqc_is_shared_and_get_irq_num() evaluates to false, completely
bypassing the test_and_clear_bit() operation.

This leaves the bit set in priv->used_irqs, causing future allocations to
fail with -EBUSY.

Fix this by retrieving irq_data and caching hwirq before calling
irq_domain_free_irqs_common().

Fixes: e0fcae27ff ("irqchip/renesas-rzg2l: Add shared interrupt support")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260328103324.134131-2-biju.das.jz@bp.renesas.com

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Biju Das 2026-03-28 10:33:18 +00:00 • committed by Thomas Gleixner

parent 9fd2170d70

commit d3689cd02c

1 changed files with 4 additions and 5 deletions

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drivers/irqchip/irq-renesas-rzg2l.c

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