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irqchip/gic-v3: Print a warning for out-of-range interrupt numbers

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gic_irq_domain_translate() does not check if an interrupt number lies
within the valid range of the specified interrupt type.  Add these checks,
and print a warning if the interrupt number is out of range.

This can help flagging incorrectly described Extended SPI and PPI
interrupts in DT.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://patch.msgid.link/ce695ea46decc816974179314a86f2b9b5cad6a9.1772799134.git.geert+renesas@glider.be
This commit is contained in:
Geert Uytterhoeven
2026-03-26 17:26:14 +01:00
committed by Thomas Gleixner
parent e0fcae27ff
commit 42972b5464
1 changed files with 8 additions and 0 deletions
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drivers/irqchip/irq-gic-v3.c
+8
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@@ -1603,15 +1603,23 @@ static int gic_irq_domain_translate(struct irq_domain *d,
switch (fwspec->param[0]) {
case 0: /* SPI */
if (fwspec->param[1] > 987)
pr_warn_once("SPI %u out of range (use ESPI?)\n", fwspec->param[1]);
*hwirq = fwspec->param[1] + 32;
break;
case 1: /* PPI */
if (fwspec->param[1] > 15)
pr_warn_once("PPI %u out of range (use EPPI?)\n", fwspec->param[1]);
*hwirq = fwspec->param[1] + 16;
break;
case 2: /* ESPI */
if (fwspec->param[1] > 1023)
pr_warn_once("ESPI %u out of range\n", fwspec->param[1]);
*hwirq = fwspec->param[1] + ESPI_BASE_INTID;
break;
case 3: /* EPPI */
if (fwspec->param[1] > 63)
pr_warn_once("EPPI %u out of range\n", fwspec->param[1]);
*hwirq = fwspec->param[1] + EPPI_BASE_INTID;
break;
case GIC_IRQ_TYPE_LPI: /* LPI */