linux-kernel - [PATCH 4.19 202/234] tty: goldfish: Fix free

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Message-Id: <20220623164348.767165728@linuxfoundation.org>
Date:   Thu, 23 Jun 2022 18:44:29 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Vincent Whitchurch <vincent.whitchurch@...s.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 202/234] tty: goldfish: Fix free_irq() on remove

From: Vincent Whitchurch <vincent.whitchurch@...s.com>

[ Upstream commit 499e13aac6c762e1e828172b0f0f5275651d6512 ]

Pass the correct dev_id to free_irq() to fix this splat when the driver
is unbound:

 WARNING: CPU: 0 PID: 30 at kernel/irq/manage.c:1895 free_irq
 Trying to free already-free IRQ 65
 Call Trace:
  warn_slowpath_fmt
  free_irq
  goldfish_tty_remove
  platform_remove
  device_remove
  device_release_driver_internal
  device_driver_detach
  unbind_store
  drv_attr_store
  ...

Fixes: 465893e18878e119 ("tty: goldfish: support platform_device with id -1")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@...s.com>
Link: https://lore.kernel.org/r/20220609141704.1080024-1-vincent.whitchurch@axis.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/tty/goldfish.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index abc84d84f638..9180ca5e4dcd 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -428,7 +428,7 @@ static int goldfish_tty_remove(struct platform_device *pdev)
 	tty_unregister_device(goldfish_tty_driver, qtty->console.index);
 	iounmap(qtty->base);
 	qtty->base = NULL;
-	free_irq(qtty->irq, pdev);
+	free_irq(qtty->irq, qtty);
 	tty_port_destroy(&qtty->port);
 	goldfish_tty_current_line_count--;
 	if (goldfish_tty_current_line_count == 0)
-- 
2.35.1