From: Chen Ni Date: Mon, 19 Jan 2026 06:04:50 +0000 (+0800) Subject: powerpc/52xx/media5200: Consolidate chained IRQ handler install/remove X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1ef8cf10cdbe79823fd6de0f0b93ca996045d1cc;p=thirdparty%2Flinux.git powerpc/52xx/media5200: Consolidate chained IRQ handler install/remove The driver currently sets the handler data and the chained handler in two separate steps. This creates a theoretical race window where an interrupt could fire after the handler is set but before the data is assigned, leading to a NULL pointer dereference. Replace the two calls with irq_set_chained_handler_and_data() to set both the handler and its data atomically under the irq_desc->lock. Signed-off-by: Chen Ni Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20260119060450.889119-1-nichen@iscas.ac.cn --- diff --git a/arch/powerpc/platforms/52xx/media5200.c b/arch/powerpc/platforms/52xx/media5200.c index bc7f83cfec1dc..c20ac8010f6d1 100644 --- a/arch/powerpc/platforms/52xx/media5200.c +++ b/arch/powerpc/platforms/52xx/media5200.c @@ -176,8 +176,8 @@ static void __init media5200_init_irq(void) of_node_put(fpga_np); - irq_set_handler_data(cascade_virq, &media5200_irq); - irq_set_chained_handler(cascade_virq, media5200_irq_cascade); + irq_set_chained_handler_and_data(cascade_virq, media5200_irq_cascade, + &media5200_irq); return;