Commit 65d57276 authored by Chen Ni's avatar Chen Ni Committed by Christophe Leroy (CS GROUP)
Browse files

soc: fsl: qe: qe_ports_ic: 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: default avatarChen Ni <nichen@iscas.ac.cn>
Link: https://lore.kernel.org/r/20260119055715.889001-1-nichen@iscas.ac.cn


Signed-off-by: default avatarChristophe Leroy (CS GROUP) <chleroy@kernel.org>
parent 0d069bb3

drivers/soc/fsl/qe/qe_ports_ic.c

+1 −2
Original line number Diff line number Diff line
@@ -114,8 +114,7 @@ static int qepic_probe(struct platform_device *pdev) 
	if (!data->host)

		return -ENODEV;



	irq_set_handler_data(irq, data);

	irq_set_chained_handler(irq, qepic_cascade);

	irq_set_chained_handler_and_data(irq, qepic_cascade, data);



	return 0;

}