irqchip/gic-v3: Fix GIC_LINE_NR accessor
authorZenghui Yu <yuzenghui@huawei.com>
Wed, 18 Sep 2019 06:57:30 +0000 (06:57 +0000)
committerMarc Zyngier <maz@kernel.org>
Wed, 18 Sep 2019 10:42:23 +0000 (11:42 +0100)
commitc107d613f9204ff9c7624c229938153d7492c56e
treea9f011174cd6864a2338ac13a9ff671bbac52394
parent212fbf2c9e84ceb267cadd8342156b69b54b8135
irqchip/gic-v3: Fix GIC_LINE_NR accessor

As per GIC spec, ITLinesNumber indicates the maximum SPI INTID that
the GIC implementation supports. And the maximum SPI INTID an
implementation might support is 1019 (field value 11111).

max(GICD_TYPER_SPIS(...), 1020) is not what we actually want for
GIC_LINE_NR. Fix it to min(GICD_TYPER_SPIS(...), 1020).

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1568789850-14080-1-git-send-email-yuzenghui@huawei.com
drivers/irqchip/irq-gic-v3.c