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| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2019-04-04 15:45:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-17 08:37:53 +0200 |
| commit | 82e1fb4d3780333e5e406157b8dc48dfb0734ed1 (patch) | |
| tree | f33bb557cd0dab8a01b414276d24f234d854cdfd /kernel | |
| parent | 3559f73ed6db1df2bd8a65ded63246d9e3bb21c9 (diff) | |
| download | linux-82e1fb4d3780333e5e406157b8dc48dfb0734ed1.tar.gz linux-82e1fb4d3780333e5e406157b8dc48dfb0734ed1.tar.bz2 linux-82e1fb4d3780333e5e406157b8dc48dfb0734ed1.zip | |
genirq: Initialize request_mutex if CONFIG_SPARSE_IRQ=n
commit e8458e7afa855317b14915d7b86ab3caceea7eb6 upstream.
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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/irqdesc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index c2bfb11a9d05..aa08d4184608 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -535,6 +535,7 @@ 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(); |