linux-kernel - [PATCH -next v2] i3c: master: svc: drop free_irq of devm_request

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Message-ID: <20210602084935.3977636-1-yangyingliang@huawei.com>
Date:   Wed, 2 Jun 2021 16:49:35 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <linux-kernel@...r.kernel.org>, <linux-i3c@...ts.infradead.org>
CC:     <alexandre.belloni@...tlin.com>, <miquel.raynal@...tlin.com>
Subject: [PATCH -next v2] i3c: master: svc: drop free_irq of devm_request_irq allocated irq

irq allocated with devm_request_irq() will be freed in devm_irq_release(),
using free_irq() in ->remove() will causes a dangling pointer, and a
subsequent double free. So remove the free_irq() in svc_i3c_master_remove().

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
v2:
  removing free_irq() instead of using devm_free_irq()
---
 drivers/i3c/master/svc-i3c-master.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c
index 1f6ba4221817..eeb49b5d90ef 100644
--- a/drivers/i3c/master/svc-i3c-master.c
+++ b/drivers/i3c/master/svc-i3c-master.c
@@ -1448,7 +1448,6 @@ static int svc_i3c_master_remove(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	free_irq(master->irq, master);
 	clk_disable_unprepare(master->pclk);
 	clk_disable_unprepare(master->fclk);
 	clk_disable_unprepare(master->sclk);
-- 
2.25.1