From c9ce9b98a8f6b81827347690fbf80de0fedfdf78 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sat, 23 Apr 2022 19:27:27 +0200 Subject: [PATCH] power: supply: ab8500_fg: Allocate wq in probe [ 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 Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin --- 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);