linux-kernel - [PATCH] usb: typec: tipd: Free IRQ only if it was requested before

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Message-ID: <20240816124150.608125-1-w.egorov@phytec.de>
Date: Fri, 16 Aug 2024 14:41:50 +0200
From: Wadim Egorov <w.egorov@...tec.de>
To: <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
CC: <upstream@...ts.phytec.de>, <heikki.krogerus@...ux.intel.com>,
	<gregkh@...uxfoundation.org>, <javier.carrasco@...fvision.net>,
	<abdelalkuor@...tab.com>, <harshit.m.mogalapalli@...cle.com>
Subject: [PATCH] usb: typec: tipd: Free IRQ only if it was requested before

In polling mode, if no IRQ was requested there is no need to free it.
Call devm_free_irq() only if client->irq is set. This fixes the warning
caused by the tps6598x module removal:

WARNING: CPU: 2 PID: 333 at kernel/irq/devres.c:144 devm_free_irq+0x80/0x8c
...
...
Call trace:
  devm_free_irq+0x80/0x8c
  tps6598x_remove+0x28/0x88 [tps6598x]
  i2c_device_remove+0x2c/0x9c
  device_remove+0x4c/0x80
  device_release_driver_internal+0x1cc/0x228
  driver_detach+0x50/0x98
  bus_remove_driver+0x6c/0xbc
  driver_unregister+0x30/0x60
  i2c_del_driver+0x54/0x64
  tps6598x_i2c_driver_exit+0x18/0xc3c [tps6598x]
  __arm64_sys_delete_module+0x184/0x264
  invoke_syscall+0x48/0x110
  el0_svc_common.constprop.0+0xc8/0xe8
  do_el0_svc+0x20/0x2c
  el0_svc+0x28/0x98
  el0t_64_sync_handler+0x13c/0x158
  el0t_64_sync+0x190/0x194

Signed-off-by: Wadim Egorov <w.egorov@...tec.de>
---
 drivers/usb/typec/tipd/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index dd51a25480bf..256b0c054e9a 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -1465,8 +1465,9 @@ static void tps6598x_remove(struct i2c_client *client)
 
 	if (!client->irq)
 		cancel_delayed_work_sync(&tps->wq_poll);
+	else
+		devm_free_irq(tps->dev, client->irq, tps);
 
-	devm_free_irq(tps->dev, client->irq, tps);
 	tps6598x_disconnect(tps, 0);
 	typec_unregister_port(tps->port);
 	usb_role_switch_put(tps->role_sw);
-- 
2.34.1