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Message-Id: <20220520025624.3803776-1-zheyuma97@gmail.com>
Date: Fri, 20 May 2022 10:56:24 +0800
From: Zheyu Ma <zheyuma97@...il.com>
To: andy@...nel.org, linus.walleij@...aro.org, brgl@...ev.pl
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
Zheyu Ma <zheyuma97@...il.com>
Subject: [PATCH v3] gpio: ml-ioh: Convert to use managed functions pcim* and devm_*
When removing the module, we will get the following flaw:
[ 14.204955] remove_proc_entry: removing non-empty directory 'irq/21', leaking at least 'gpio_ml_ioh'
[ 14.205827] WARNING: CPU: 0 PID: 305 at fs/proc/generic.c:717 remove_proc_entry+0x389/0x3f0
...
[ 14.220613] ioh_gpio_remove+0xc5/0xe0 [gpio_ml_ioh]
[ 14.221075] pci_device_remove+0x92/0x240
Fix this by using managed functions, this makes the error handling more
simpler.
Fixes: e971ac9a564a ("gpio: ml-ioh: use resource management for irqs")
Signed-off-by: Zheyu Ma <zheyuma97@...il.com>
---
drivers/gpio/gpio-ml-ioh.c | 76 ++++++++------------------------------
1 file changed, 16 insertions(+), 60 deletions(-)
diff --git a/drivers/gpio/gpio-ml-ioh.c b/drivers/gpio/gpio-ml-ioh.c
index b060c4773698..48e3768a830e 100644
--- a/drivers/gpio/gpio-ml-ioh.c
+++ b/drivers/gpio/gpio-ml-ioh.c
@@ -409,29 +409,27 @@ static int ioh_gpio_probe(struct pci_dev *pdev,
void *chip_save;
int irq_base;
- ret = pci_enable_device(pdev);
+ ret = pcim_enable_device(pdev);
if (ret) {
- dev_err(dev, "%s : pci_enable_device failed", __func__);
- goto err_pci_enable;
+ dev_err(dev, "%s : pcim_enable_device failed", __func__);
+ return ret;
}
- ret = pci_request_regions(pdev, KBUILD_MODNAME);
+ ret = pcim_iomap_regions(pdev, BIT(1), KBUILD_MODNAME);
if (ret) {
- dev_err(dev, "pci_request_regions failed-%d", ret);
- goto err_request_regions;
+ dev_err(dev, "pcim_iomap_regions failed-%d", ret);
+ return ret;
}
- base = pci_iomap(pdev, 1, 0);
+ base = pcim_iomap_table(pdev)[1];
if (!base) {
- dev_err(dev, "%s : pci_iomap failed", __func__);
- ret = -ENOMEM;
- goto err_iomap;
+ dev_err(dev, "%s : pcim_iomap_table failed", __func__);
+ return -ENOMEM;
}
- chip_save = kcalloc(8, sizeof(*chip), GFP_KERNEL);
+ chip_save = devm_kcalloc(dev, 8, sizeof(*chip), GFP_KERNEL);
if (chip_save == NULL) {
- ret = -ENOMEM;
- goto err_kzalloc;
+ return -ENOMEM;
}
chip = chip_save;
@@ -442,10 +440,10 @@ static int ioh_gpio_probe(struct pci_dev *pdev,
chip->ch = i;
spin_lock_init(&chip->spinlock);
ioh_gpio_setup(chip, num_ports[i]);
- ret = gpiochip_add_data(&chip->gpio, chip);
+ ret = devm_gpiochip_add_data(dev, &chip->gpio, chip);
if (ret) {
dev_err(dev, "IOH gpio: Failed to register GPIO\n");
- goto err_gpiochip_add;
+ return ret;
}
}
@@ -456,15 +454,14 @@ static int ioh_gpio_probe(struct pci_dev *pdev,
if (irq_base < 0) {
dev_warn(dev,
"ml_ioh_gpio: Failed to get IRQ base num\n");
- ret = irq_base;
- goto err_gpiochip_add;
+ return irq_base;
}
chip->irq_base = irq_base;
ret = ioh_gpio_alloc_generic_chip(chip,
irq_base, num_ports[j]);
if (ret)
- goto err_gpiochip_add;
+ return ret;
}
chip = chip_save;
@@ -472,52 +469,12 @@ static int ioh_gpio_probe(struct pci_dev *pdev,
IRQF_SHARED, KBUILD_MODNAME, chip);
if (ret != 0) {
dev_err(dev, "%s request_irq failed\n", __func__);
- goto err_gpiochip_add;
+ return ret;
}
pci_set_drvdata(pdev, chip);
return 0;
-
-err_gpiochip_add:
- chip = chip_save;
- while (--i >= 0) {
- gpiochip_remove(&chip->gpio);
- chip++;
- }
- kfree(chip_save);
-
-err_kzalloc:
- pci_iounmap(pdev, base);
-
-err_iomap:
- pci_release_regions(pdev);
-
-err_request_regions:
- pci_disable_device(pdev);
-
-err_pci_enable:
-
- dev_err(dev, "%s Failed returns %d\n", __func__, ret);
- return ret;
-}
-
-static void ioh_gpio_remove(struct pci_dev *pdev)
-{
- int i;
- struct ioh_gpio *chip = pci_get_drvdata(pdev);
- void *chip_save;
-
- chip_save = chip;
-
- for (i = 0; i < 8; i++, chip++)
- gpiochip_remove(&chip->gpio);
-
- chip = chip_save;
- pci_iounmap(pdev, chip->base);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
- kfree(chip);
}
static int __maybe_unused ioh_gpio_suspend(struct device *dev)
@@ -558,7 +515,6 @@ static struct pci_driver ioh_gpio_driver = {
.name = "ml_ioh_gpio",
.id_table = ioh_gpio_pcidev_id,
.probe = ioh_gpio_probe,
- .remove = ioh_gpio_remove,
.driver = {
.pm = &ioh_gpio_pm_ops,
},
--
2.36.1
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