mpc85xx_edac.c: Should the mpc85xx_l2_isr be shared irqs?

[Xufeng Zhang]

Hi All,

I detected below error when booting p1021mds after enabled EDAC feature:
EDAC MC: Ver: 2.1.0 Jul 17 2012
Freescale(R) MPC85xx EDAC driver, (C) 2006 Montavista Software
EDAC MC0: Giving out device to 'MPC85xx_edac' 'mpc85xx_mc_err': DEV mpc85xx_mc_e
rr
IRQ 45/[EDAC] MC err: IRQF_DISABLED is not guaranteed on shared IRQs
MPC85xx_edac acquired irq 45 for MC
MPC85xx_edac MC err registered
EDAC DEVICE0: Giving out device to module 'MPC85xx_edac' controller 'mpc85xx_l2_
err': DEV 'mpc85xx_l2_err' (INTERRUPT)
mpc85xx_l2_err_probe: Unable to requiest irq 45 for MPC85xx L2 err

Then kernel hang.

When request irq for l2-cache, since it share the same irq with memory
controller,
I think the code should be:
--- a/drivers/edac/mpc85xx_edac.c
+++ b/drivers/edac/mpc85xx_edac.c
@@ -577,7 +577,7 @@ static int __devinit mpc85xx_l2_err_probe(struct
of_device *op,
 	if (edac_op_state == EDAC_OPSTATE_INT) {
 		pdata->irq = irq_of_parse_and_map(op->node, 0);
 		res = devm_request_irq(&op->dev, pdata->irq,
-				       mpc85xx_l2_isr, IRQF_DISABLED,
+				       mpc85xx_l2_isr, IRQF_DISABLED | IRQF_SHARED,
 				       "[EDAC] L2 err", edac_dev);
 		if (res < 0) {
 			printk(KERN_ERR





Thanks,
Xufeng Zhang