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| author | Thomas Gleixner <tglx@linutronix.de> | 2018-01-30 19:36:32 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-02-01 11:09:40 +0100 |
| commit | 1beaeacdc88b537703d04d5536235d0bbb36db93 (patch) | |
| tree | 3a1e0d79526c7ee3d84f7cbdd3a340079be5a290 /kernel/irq/chip.c | |
| parent | 8de50dc26278a05363781514beb092a366c84654 (diff) | |
| download | lwn-1beaeacdc88b537703d04d5536235d0bbb36db93.tar.gz lwn-1beaeacdc88b537703d04d5536235d0bbb36db93.zip | |
genirq: Make legacy autoprobing work again
Meelis reported the following warning on a quad P3 HP NetServer museum piece:
WARNING: CPU: 3 PID: 258 at kernel/irq/chip.c:244 __irq_startup+0x80/0x100
EIP: __irq_startup+0x80/0x100
irq_startup+0x7e/0x170
probe_irq_on+0x128/0x2b0
parport_irq_probe.constprop.18+0x8d/0x1af [parport_pc]
parport_pc_probe_port+0xf11/0x1260 [parport_pc]
parport_pc_init+0x78a/0xf10 [parport_pc]
parport_parse_param.constprop.16+0xf0/0xf0 [parport_pc]
do_one_initcall+0x45/0x1e0
This is caused by the rewrite of the irq activation/startup sequence which
missed to convert a callsite in the irq legacy auto probing code.
To fix this irq_activate_and_startup() needs to gain a return value so the
pending logic can work proper.
Fixes: c942cee46bba ("genirq: Separate activation and startup")
Reported-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Meelis Roos <mroos@linux.ee>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/alpine.DEB.2.20.1801301935410.1797@nanos
Diffstat (limited to 'kernel/irq/chip.c')
| -rw-r--r-- | kernel/irq/chip.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 043bfc35b353..c69357a43849 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -294,11 +294,11 @@ int irq_activate(struct irq_desc *desc) return 0; } -void irq_activate_and_startup(struct irq_desc *desc, bool resend) +int irq_activate_and_startup(struct irq_desc *desc, bool resend) { if (WARN_ON(irq_activate(desc))) - return; - irq_startup(desc, resend, IRQ_START_FORCE); + return 0; + return irq_startup(desc, resend, IRQ_START_FORCE); } static void __irq_disable(struct irq_desc *desc, bool mask); |