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@chromium.org>
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Fixes: 44bd78dd2b88 ("irqchip/gic-v3: Disable pseudo NMIs on Mediatek devices w/ firmware issues")
Signed-off-by: Marc Zyngier <maz@kernel.org>

diff --git a/drivers/irqchip/irq-gic-common.c b/drivers/irqchip/irq-gic-common.c
index de47b51..afd6a18 100644 (file)
--- 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;