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Subject[PATCH 11/21] platform: goldfish: pipe: Move memory allocation from probe to init
From
From: Roman Kiryanov <rkir@google.com>

There will be two separate init functions for v1 and v2 and they
will allocate different state.

Signed-off-by: Roman Kiryanov <rkir@google.com>
---
drivers/platform/goldfish/goldfish_pipe_v2.c | 41 +++++++++++---------
1 file changed, 22 insertions(+), 19 deletions(-)

diff --git a/drivers/platform/goldfish/goldfish_pipe_v2.c b/drivers/platform/goldfish/goldfish_pipe_v2.c
index c68035be4389..ccde28abcb24 100644
--- a/drivers/platform/goldfish/goldfish_pipe_v2.c
+++ b/drivers/platform/goldfish/goldfish_pipe_v2.c
@@ -241,8 +241,6 @@ struct goldfish_pipe_dev {
struct device *pdev_dev;

/* Some device-specific data */
- int irq;
- int version;
unsigned char __iomem *base;

/* an irq tasklet to run goldfish_interrupt_task */
@@ -1125,14 +1123,23 @@ static void write_pa_addr(void *addr, void __iomem *portl, void __iomem *porth)
}

static int goldfish_pipe_device_init(struct platform_device *pdev,
- struct goldfish_pipe_dev *dev)
+ char __iomem *base,
+ int irq)
{
+ struct goldfish_pipe_dev *dev;
int err;

+ dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->magic = &goldfish_pipe_device_deinit;
+ spin_lock_init(&dev->lock);
+
tasklet_init(&dev->irq_tasklet, &goldfish_interrupt_task,
(unsigned long)dev);

- err = devm_request_irq(&pdev->dev, dev->irq,
+ err = devm_request_irq(&pdev->dev, irq,
goldfish_pipe_interrupt,
IRQF_SHARED, "goldfish_pipe", dev);
if (err) {
@@ -1147,6 +1154,7 @@ static int goldfish_pipe_device_init(struct platform_device *pdev,
return err;
}

+ dev->base = base;
dev->pdev_dev = &pdev->dev;
dev->first_signalled_pipe = NULL;
dev->pipes_capacity = INITIAL_PIPES_CAPACITY;
@@ -1197,22 +1205,17 @@ static void goldfish_pipe_device_deinit(struct platform_device *pdev,
static int goldfish_pipe_probe(struct platform_device *pdev)
{
struct resource *r;
- struct goldfish_pipe_dev *dev;
-
- dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
-
- dev->magic = &goldfish_pipe_device_deinit;
- spin_lock_init(&dev->lock);
+ char __iomem *base;
+ int irq;
+ int version;

r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r || resource_size(r) < PAGE_SIZE) {
dev_err(&pdev->dev, "can't allocate i/o page\n");
return -EINVAL;
}
- dev->base = devm_ioremap(&pdev->dev, r->start, PAGE_SIZE);
- if (!dev->base) {
+ base = devm_ioremap(&pdev->dev, r->start, PAGE_SIZE);
+ if (!base) {
dev_err(&pdev->dev, "ioremap failed\n");
return -EINVAL;
}
@@ -1221,7 +1224,7 @@ static int goldfish_pipe_probe(struct platform_device *pdev)
if (!r)
return -EINVAL;

- dev->irq = r->start;
+ irq = r->start;

/*
* Exchange the versions with the host device
@@ -1230,12 +1233,12 @@ static int goldfish_pipe_probe(struct platform_device *pdev)
* reading device version back: this allows the host implementation to
* detect the old driver (if there was no version write before read).
*/
- writel((u32)PIPE_DRIVER_VERSION, dev->base + PIPE_REG_VERSION);
- dev->version = readl(dev->base + PIPE_REG_VERSION);
- if (WARN_ON(dev->version < PIPE_CURRENT_DEVICE_VERSION))
+ writel((u32)PIPE_DRIVER_VERSION, base + PIPE_REG_VERSION);
+ version = readl(base + PIPE_REG_VERSION);
+ if (WARN_ON(version < PIPE_CURRENT_DEVICE_VERSION))
return -EINVAL;

- return goldfish_pipe_device_init(pdev, dev);
+ return goldfish_pipe_device_init(pdev, base, irq);
}

static int goldfish_pipe_remove(struct platform_device *pdev)
--
2.19.0.397.gdd90340f6a-goog
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