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authorKefeng Wang <wangkefeng.wang@huawei.com>2019-04-04 10:45:12 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-04-05 15:37:56 +0300
commite8458e7afa855317b14915d7b86ab3caceea7eb6 (patch)
tree45c8c14cff557df065f8d0ee072e7e73603262f0 /kernel/irq
parent95c5c618fa4349b2ba13aebeabf71911208dfc5e (diff)
downloadlinux-e8458e7afa855317b14915d7b86ab3caceea7eb6.tar.xz
genirq: Initialize request_mutex if CONFIG_SPARSE_IRQ=n
When CONFIG_SPARSE_IRQ is disable, the request_mutex in struct irq_desc is not initialized which causes malfunction. Fixes: 9114014cf4e6 ("genirq: Add mutex to irq desc to serialize request/free_irq()") Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Mukesh Ojha <mojha@codeaurora.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20190404074512.145533-1-wangkefeng.wang@huawei.com
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/irqdesc.c1
1 files changed, 1 insertions, 0 deletions
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();