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https://github.com/edk2-porting/linux-next.git
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11bca0a83f
An interrupt storm on a bad interrupt will cause the kernel log to be clogged. [ 60.089234] ->handle_irq(): ffffffffbe2f803f, [ 60.090455] 0xffffffffbf2af380 [ 60.090510] handle_bad_irq+0x0/0x2e5 [ 60.090522] ->irq_data.chip(): ffffffffbf2af380, [ 60.090553] IRQ_NOPROBE set [ 60.090584] ->handle_irq(): ffffffffbe2f803f, [ 60.090590] handle_bad_irq+0x0/0x2e5 [ 60.090596] ->irq_data.chip(): ffffffffbf2af380, [ 60.090602] 0xffffffffbf2af380 [ 60.090608] ->action(): (null) [ 60.090779] handle_bad_irq+0x0/0x2e5 This was seen when running an upstream kernel on Acer Chromebook R11. The system was unstable as result. Guard the log message with __printk_ratelimit to reduce the impact. This won't prevent the interrupt storm from happening, but at least the system remains stable. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Dmitry Torokhov <dtor@chromium.org> Cc: Joe Perches <joe@perches.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Link: https://bugzilla.kernel.org/show_bug.cgi?id=197953 Link: https://lkml.kernel.org/r/1512234784-21038-1-git-send-email-linux@roeck-us.net
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Debugging printout:
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*/
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#include <linux/kallsyms.h>
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#define ___P(f) if (desc->status_use_accessors & f) printk("%14s set\n", #f)
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#define ___PS(f) if (desc->istate & f) printk("%14s set\n", #f)
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/* FIXME */
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#define ___PD(f) do { } while (0)
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static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
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{
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static DEFINE_RATELIMIT_STATE(ratelimit, 5 * HZ, 5);
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if (!__ratelimit(&ratelimit))
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return;
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printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
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irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
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printk("->handle_irq(): %p, ", desc->handle_irq);
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print_symbol("%s\n", (unsigned long)desc->handle_irq);
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printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
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print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
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printk("->action(): %p\n", desc->action);
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if (desc->action) {
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printk("->action->handler(): %p, ", desc->action->handler);
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print_symbol("%s\n", (unsigned long)desc->action->handler);
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}
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___P(IRQ_LEVEL);
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___P(IRQ_PER_CPU);
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___P(IRQ_NOPROBE);
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___P(IRQ_NOREQUEST);
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___P(IRQ_NOTHREAD);
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___P(IRQ_NOAUTOEN);
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___PS(IRQS_AUTODETECT);
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___PS(IRQS_REPLAY);
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___PS(IRQS_WAITING);
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___PS(IRQS_PENDING);
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___PD(IRQS_INPROGRESS);
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___PD(IRQS_DISABLED);
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___PD(IRQS_MASKED);
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}
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#undef ___P
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#undef ___PS
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#undef ___PD
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