[irqchip: irq/irqchip-fixes] irqchip/gic: Correctly validate OF quirk descriptors

[irqchip-bot for Marc Zyngier]

The following commit has been merged into the irq/irqchip-fixes branch of irqchip:

Commit-ID:     91539341a3b6e9c868024a4292455dae36e6f58c
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/91539341a3b6e9c868024a4292455dae36e6f58c
Author:        Marc Zyngier <maz@xxxxxxxxxx>
AuthorDate:    Tue, 30 May 2023 11:01:22 +01:00
Committer:     Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Tue, 30 May 2023 11:01:22 +01:00

irqchip/gic: Correctly validate OF quirk descriptors

When checking for OF quirks, make sure either 'compatible' or 'property'
is set, and give up otherwise.

This avoids non-OF quirks being randomly applied as they don't have any
of the OF data that need checking.

Cc: Douglas Anderson <dianders@xxxxxxxxxxxx>
Reported-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Fixes: 44bd78dd2b88 ("irqchip/gic-v3: Disable pseudo NMIs on Mediatek devices w/ firmware issues")
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
 drivers/irqchip/irq-gic-common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c
index de47b51..afd6a18 100644
--- a/drivers/irqchip/irq-gic-common.c
+++ b/drivers/irqchip/irq-gic-common.c
@@ -16,6 +16,8 @@ void gic_enable_of_quirks(const struct device_node *np,
 			  const struct gic_quirk *quirks, void *data)
 {
 	for (; quirks->desc; quirks++) {
+		if (!quirks->compatible && !quirks->property)
+			continue;
 		if (quirks->compatible &&
 		    !of_device_is_compatible(np, quirks->compatible))
 			continue;