[PATCH 1/3] hwspinlock: omap: Change to use devm_platform_ioremap_resource()

From: Baolin Wang
Date: Wed Dec 04 2019 - 04:32:19 EST


Use the new helper that wraps the calls to platform_get_resource()
and devm_ioremap_resource() together, which can simpify the code.
Meanwhile renaming the error label to make more sense after removing
iounmap().

Signed-off-by: Baolin Wang <baolin.wang7@xxxxxxxxx>
---
drivers/hwspinlock/omap_hwspinlock.c | 24 ++++++++----------------
1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c
index 14e1a53..dbb1a4c 100644
--- a/drivers/hwspinlock/omap_hwspinlock.c
+++ b/drivers/hwspinlock/omap_hwspinlock.c
@@ -76,7 +76,6 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
struct device_node *node = pdev->dev.of_node;
struct hwspinlock_device *bank;
struct hwspinlock *hwlock;
- struct resource *res;
void __iomem *io_base;
int num_locks, i, ret;
/* Only a single hwspinlock block device is supported */
@@ -85,13 +84,9 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
if (!node)
return -ENODEV;

- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
-
- io_base = ioremap(res->start, resource_size(res));
- if (!io_base)
- return -ENOMEM;
+ io_base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(io_base))
+ return PTR_ERR(io_base);

/*
* make sure the module is enabled and clocked before reading
@@ -101,7 +96,7 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0) {
pm_runtime_put_noidle(&pdev->dev);
- goto iounmap_base;
+ goto runtime_err;
}

/* Determine number of locks */
@@ -114,12 +109,12 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
*/
ret = pm_runtime_put(&pdev->dev);
if (ret < 0)
- goto iounmap_base;
+ goto runtime_err;

/* one of the four lsb's must be set, and nothing else */
if (hweight_long(i & 0xf) != 1 || i > 8) {
ret = -EINVAL;
- goto iounmap_base;
+ goto runtime_err;
}

num_locks = i * 32; /* actual number of locks in this device */
@@ -127,7 +122,7 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
bank = kzalloc(struct_size(bank, lock, num_locks), GFP_KERNEL);
if (!bank) {
ret = -ENOMEM;
- goto iounmap_base;
+ goto runtime_err;
}

platform_set_drvdata(pdev, bank);
@@ -147,16 +142,14 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)

reg_fail:
kfree(bank);
-iounmap_base:
+runtime_err:
pm_runtime_disable(&pdev->dev);
- iounmap(io_base);
return ret;
}

static int omap_hwspinlock_remove(struct platform_device *pdev)
{
struct hwspinlock_device *bank = platform_get_drvdata(pdev);
- void __iomem *io_base = bank->lock[0].priv - LOCK_BASE_OFFSET;
int ret;

ret = hwspin_lock_unregister(bank);
@@ -166,7 +159,6 @@ static int omap_hwspinlock_remove(struct platform_device *pdev)
}

pm_runtime_disable(&pdev->dev);
- iounmap(io_base);
kfree(bank);

return 0;
--
1.7.9.5