mirror of
https://github.com/openwrt/openwrt.git
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52 lines
2.0 KiB
Diff
52 lines
2.0 KiB
Diff
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From 0c2ce359491f9eafe67c4118be10070fb8ca367d Mon Sep 17 00:00:00 2001
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From: Padmanabha Srinivasaiah <treasure4paddy@gmail.com>
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Date: Thu, 30 Dec 2021 21:45:10 +0100
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Subject: [PATCH] bcm2835-v4l2-isp: Add missing lock initialization
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ISP device allocation is dynamic hence the locks too.
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struct mutex queue_lock is not initialized which result in bug.
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Fixing same by initializing it.
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[ 29.847138] INFO: trying to register non-static key.
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[ 29.847156] The code is fine but needs lockdep annotation, or maybe
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[ 29.847159] you didn't initialize this object before use?
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[ 29.847161] turning off the locking correctness validator.
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[ 29.847167] CPU: 1 PID: 343 Comm: v4l_id Tainted: G C 5.15.11-rt24-v8+ #8
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[ 29.847187] Hardware name: Raspberry Pi 4 Model B Rev 1.4 (DT)
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[ 29.847194] Call trace:
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[ 29.847197] dump_backtrace+0x0/0x1b8
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[ 29.847227] show_stack+0x20/0x30
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[ 29.847240] dump_stack_lvl+0x8c/0xb8
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[ 29.847254] dump_stack+0x18/0x34
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[ 29.847263] register_lock_class+0x494/0x4a0
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[ 29.847278] __lock_acquire+0x80/0x1680
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[ 29.847289] lock_acquire+0x214/0x3a0
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[ 29.847300] mutex_lock_nested+0x70/0xc8
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[ 29.847312] _vb2_fop_release+0x3c/0xa8 [videobuf2_v4l2]
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[ 29.847346] vb2_fop_release+0x34/0x60 [videobuf2_v4l2]
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[ 29.847367] v4l2_release+0xc8/0x108 [videodev]
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[ 29.847453] __fput+0x8c/0x258
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[ 29.847476] ____fput+0x18/0x28
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[ 29.847487] task_work_run+0x98/0x180
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[ 29.847502] do_notify_resume+0x228/0x3f8
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[ 29.847515] el0_svc+0xec/0xf0
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[ 29.847523] el0t_64_sync_handler+0x90/0xb8
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[ 29.847531] el0t_64_sync+0x180/0x184
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Signed-off-by: Padmanabha Srinivasaiah <treasure4paddy@gmail.com>
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---
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drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c | 1 +
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1 file changed, 1 insertion(+)
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--- a/drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
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+++ b/drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
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@@ -1296,6 +1296,7 @@ static int register_node(struct bcm2835_
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int ret;
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mutex_init(&node->lock);
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+ mutex_init(&node->queue_lock);
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node->dev = dev;
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vfd = &node->vfd;
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