This is a note to let you know that I've just added the patch titled
genirq: Fix descriptor init on non-sparse IRQs
to the 2.6.39-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
genirq-fix-descriptor-init-on-non-sparse-irqs.patch
and it can be found in the queue-2.6.39 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From e7fbad300a7a6432238f086e3c9a61538a905858 Mon Sep 17 00:00:00 2001
From: Linus Walleij <[email protected]>
Date: Tue, 31 May 2011 18:14:39 +0200
Subject: genirq: Fix descriptor init on non-sparse IRQs
From: Linus Walleij <[email protected]>
commit e7fbad300a7a6432238f086e3c9a61538a905858 upstream.
The genirq changes are initializing descriptors for sparse IRQs quite
differently from how non-sparse (stacked?) IRQs are initialized, with
the effect that on my platform all IRQs are default-disabled on sparse
IRQs and default-enabled if non-sparse IRQs are used, crashing some
GPIO driver.
Fix this by refactoring the non-sparse IRQs to use the same descriptor
init function as the sparse IRQs.
Signed-off: Linus Walleij <[email protected]>
Link:
http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
kernel/irq/irqdesc.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -257,13 +257,11 @@ int __init early_irq_init(void)
count = ARRAY_SIZE(irq_desc);
for (i = 0; i < count; i++) {
- desc[i].irq_data.irq = i;
- desc[i].irq_data.chip = &no_irq_chip;
desc[i].kstat_irqs = alloc_percpu(unsigned int);
- irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);
- alloc_masks(desc + i, GFP_KERNEL, node);
- desc_smp_init(desc + i, node);
+ alloc_masks(&desc[i], GFP_KERNEL, node);
+ raw_spin_lock_init(&desc[i].lock);
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
+ desc_set_defaults(i, &desc[i], node);
}
return arch_early_irq_init();
}
Patches currently in stable-queue which might be from
[email protected] are
queue-2.6.39/genirq-fix-descriptor-init-on-non-sparse-irqs.patch
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