* [PATCH] genirq: Fix uninitialized request_mutex
@ 2019-04-04 7:45 Kefeng Wang
2019-04-04 7:59 ` Mukesh Ojha
0 siblings, 1 reply; 2+ messages in thread
From: Kefeng Wang @ 2019-04-04 7:45 UTC (permalink / raw)
To: Thomas Gleixner, Marc Zyngier, linux-kernel, linux-arm-kernel; +Cc: Kefeng Wang
When !CONFIG_SPARSE_IRQ, request_mutex of struct irq_desc won't
be initialiezed, it leads to system hung, fix it.
Fixes: 9114014cf4e6 ("genirq: Add mutex to irq desc to serialize request/free_irq()")
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
kernel/irq/irqdesc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 13539e12cd80..9f8a709337cf 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -558,6 +558,7 @@ int __init early_irq_init(void)
alloc_masks(&desc[i], node);
raw_spin_lock_init(&desc[i].lock);
lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
+ mutex_init(&desc[i].request_mutex);
desc_set_defaults(i, &desc[i], node, NULL, NULL);
}
return arch_early_irq_init();
--
2.20.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] genirq: Fix uninitialized request_mutex
2019-04-04 7:45 [PATCH] genirq: Fix uninitialized request_mutex Kefeng Wang
@ 2019-04-04 7:59 ` Mukesh Ojha
0 siblings, 0 replies; 2+ messages in thread
From: Mukesh Ojha @ 2019-04-04 7:59 UTC (permalink / raw)
To: Kefeng Wang, Thomas Gleixner, Marc Zyngier, linux-kernel,
linux-arm-kernel
On 4/4/2019 1:15 PM, Kefeng Wang wrote:
> When !CONFIG_SPARSE_IRQ, request_mutex of struct irq_desc won't
> be initialiezed, it leads to system hung, fix it.
>
> Fixes: 9114014cf4e6 ("genirq: Add mutex to irq desc to serialize request/free_irq()")
> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Cheers,
-Mukesh
> ---
> kernel/irq/irqdesc.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
> index 13539e12cd80..9f8a709337cf 100644
> --- a/kernel/irq/irqdesc.c
> +++ b/kernel/irq/irqdesc.c
> @@ -558,6 +558,7 @@ int __init early_irq_init(void)
> alloc_masks(&desc[i], node);
> raw_spin_lock_init(&desc[i].lock);
> lockdep_set_class(&desc[i].lock, &irq_desc_lock_class);
> + mutex_init(&desc[i].request_mutex);
> desc_set_defaults(i, &desc[i], node, NULL, NULL);
> }
> return arch_early_irq_init();
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2019-04-04 7:59 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-04-04 7:45 [PATCH] genirq: Fix uninitialized request_mutex Kefeng Wang
2019-04-04 7:59 ` Mukesh Ojha
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox