From: Dmitry Osipenko <dmitry.osipenko@collabora.com>
To: Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v1] dmaengine: pl330: Fix lockdep warning about non-static key
Date: Fri, 20 May 2022 21:14:32 +0300 [thread overview]
Message-ID: <20220520181432.149904-1-dmitry.osipenko@collabora.com> (raw)
The DEFINE_SPINLOCK() macro shouldn't be used for dynamically allocated
spinlocks. The lockdep warns about this and disables locking validator.
Fix the warning by making lock static.
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
Hardware name: Radxa ROCK Pi 4C (DT)
Call trace:
dump_backtrace.part.0+0xcc/0xe0
show_stack+0x18/0x6c
dump_stack_lvl+0x8c/0xb8
dump_stack+0x18/0x34
register_lock_class+0x4a8/0x4cc
__lock_acquire+0x78/0x20cc
lock_acquire.part.0+0xe0/0x230
lock_acquire+0x68/0x84
_raw_spin_lock_irqsave+0x84/0xc4
add_desc+0x44/0xc0
pl330_get_desc+0x15c/0x1d0
pl330_prep_dma_cyclic+0x100/0x270
snd_dmaengine_pcm_trigger+0xec/0x1c0
dmaengine_pcm_trigger+0x18/0x24
...
Fixes: e588710311ee ("dmaengine: pl330: fix descriptor allocation fail")
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
drivers/dma/pl330.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 858400e42ec0..09915a5cba3e 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2589,7 +2589,7 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
/* If the DMAC pool is empty, alloc new */
if (!desc) {
- DEFINE_SPINLOCK(lock);
+ static DEFINE_SPINLOCK(lock);
LIST_HEAD(pool);
if (!add_desc(&pool, &lock, GFP_ATOMIC, 1))
--
2.35.3
next reply other threads:[~2022-05-20 18:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-20 18:14 Dmitry Osipenko [this message]
2022-07-06 5:19 ` [PATCH v1] dmaengine: pl330: Fix lockdep warning about non-static key Vinod Koul
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