linux-kernel - [PATCH 5.17 038/298] power: supply: ab8500

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220613094926.091998782@linuxfoundation.org>
Date:   Mon, 13 Jun 2022 12:08:52 +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, Linus Walleij <linus.walleij@...aro.org>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.17 038/298] power: supply: ab8500_fg: Allocate wq in probe

From: Linus Walleij <linus.walleij@...aro.org>

[ Upstream commit 010ddb813f3554cbbf8bd13b731452236a2c8017 ]

The workqueue is allocated in bind() but all interrupts are
registered in probe().

Some interrupts put work on the workqueue, which can have
bad side effects.

Allocate the workqueue in probe() instead, destroy it in
.remove() and make unbind() simply flush the workqueue.

Fixes: 1c1f13a006ed ("power: supply: ab8500: Move to componentized binding")
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/power/supply/ab8500_fg.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c
index 09a4cbd69676..23adcb597ff9 100644
--- a/drivers/power/supply/ab8500_fg.c
+++ b/drivers/power/supply/ab8500_fg.c
@@ -2995,13 +2995,6 @@ static int ab8500_fg_bind(struct device *dev, struct device *master,
 {
 	struct ab8500_fg *di = dev_get_drvdata(dev);
 
-	/* Create a work queue for running the FG algorithm */
-	di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq", WQ_MEM_RECLAIM);
-	if (di->fg_wq == NULL) {
-		dev_err(dev, "failed to create work queue\n");
-		return -ENOMEM;
-	}
-
 	di->bat_cap.max_mah_design = di->bm->bi->charge_full_design_uah;
 	di->bat_cap.max_mah = di->bat_cap.max_mah_design;
 	di->vbat_nom_uv = di->bm->bi->voltage_max_design_uv;
@@ -3025,8 +3018,7 @@ static void ab8500_fg_unbind(struct device *dev, struct device *master,
 	if (ret)
 		dev_err(dev, "failed to disable coulomb counter\n");
 
-	destroy_workqueue(di->fg_wq);
-	flush_scheduled_work();
+	flush_workqueue(di->fg_wq);
 }
 
 static const struct component_ops ab8500_fg_component_ops = {
@@ -3070,6 +3062,13 @@ static int ab8500_fg_probe(struct platform_device *pdev)
 	ab8500_fg_charge_state_to(di, AB8500_FG_CHARGE_INIT);
 	ab8500_fg_discharge_state_to(di, AB8500_FG_DISCHARGE_INIT);
 
+	/* Create a work queue for running the FG algorithm */
+	di->fg_wq = alloc_ordered_workqueue("ab8500_fg_wq", WQ_MEM_RECLAIM);
+	if (di->fg_wq == NULL) {
+		dev_err(dev, "failed to create work queue\n");
+		return -ENOMEM;
+	}
+
 	/* Init work for running the fg algorithm instantly */
 	INIT_WORK(&di->fg_work, ab8500_fg_instant_work);
 
@@ -3181,6 +3180,8 @@ static int ab8500_fg_remove(struct platform_device *pdev)
 	int ret = 0;
 	struct ab8500_fg *di = platform_get_drvdata(pdev);
 
+	destroy_workqueue(di->fg_wq);
+	flush_scheduled_work();
 	component_del(&pdev->dev, &ab8500_fg_component_ops);
 	list_del(&di->node);
 	ab8500_fg_sysfs_exit(di);
-- 
2.35.1