linux-kernel - [PATCH] i3c: dw: Initialize spinlock to avoid upsetting lockdep

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Message-Id: <20260115-i3c_dw_initialize_spinlock-v1-1-b9c5bfa8be24@est.tech>
Date: Thu, 15 Jan 2026 14:25:29 +0100
From: Fredrik Markstrom via B4 Relay <devnull+fredrik.markstrom.est.tech@...nel.org>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Frank Li <Frank.Li@....com>, Joel Stanley <joel@....id.au>, 
 Jeremy Kerr <jk@...econstruct.com.au>
Cc: linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Jani Nurminen <jani.nurminen@...driver.com>, 
 Fredrik Markstrom <fredrik.markstrom@....tech>, 
 Ivar Holmqvist <ivar.holmqvist@....tech>
Subject: [PATCH] i3c: dw: Initialize spinlock to avoid upsetting lockdep

From: Fredrik Markstrom <fredrik.markstrom@....tech>

Fixes: e389b1d72a624 ("i3c: dw: Add support for in-band interrupts")
Suggested-by: Jani Nurminen <jani.nurminen@...driver.com>
Signed-off-by: Fredrik Markstrom <fredrik.markstrom@....tech>
Reviewed-by: Ivar Holmqvist <ivar.holmqvist@....tech>
---
 drivers/i3c/master/dw-i3c-master.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 889e2ed5bc83..d5b070404056 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -1570,6 +1570,8 @@ int dw_i3c_common_probe(struct dw_i3c_master *master,
 	spin_lock_init(&master->xferqueue.lock);
 	INIT_LIST_HEAD(&master->xferqueue.list);
 
+	spin_lock_init(&master->devs_lock);
+
 	writel(INTR_ALL, master->regs + INTR_STATUS);
 	irq = platform_get_irq(pdev, 0);
 	ret = devm_request_irq(&pdev->dev, irq,

---
base-commit: 0f61b1860cc3f52aef9036d7235ed1f017632193
change-id: 20260115-i3c_dw_initialize_spinlock-d878212a846b

Best regards,
-- 
Fredrik Markstrom <fredrik.markstrom@....tech>