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Date: Tue, 12 Jun 2012 20:19:24 +0200
From: Linus Walleij <linus.walleij@...ricsson.com>
To: Vinod Koul <vinod.koul@...el.com>
Cc: <linux-kernel@...r.kernel.org>,
Dan Williams <dan.j.williams@...el.com>,
Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH] dma: coh901318: use devm allocation
From: Linus Walleij <linus.walleij@...aro.org>
Allocate memory, region, remap and irq for device state using
devm_* helpers to simplify memory accounting.
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
drivers/dma/coh901318.c | 72 ++++++++++++++++-------------------------------
1 file changed, 24 insertions(+), 48 deletions(-)
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index e67b4e0..aa384e5 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -1438,34 +1438,32 @@ static int __init coh901318_probe(struct platform_device *pdev)
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io)
- goto err_get_resource;
+ return -ENODEV;
/* Map DMA controller registers to virtual memory */
- if (request_mem_region(io->start,
- resource_size(io),
- pdev->dev.driver->name) == NULL) {
- err = -EBUSY;
- goto err_request_mem;
- }
+ if (devm_request_mem_region(&pdev->dev,
+ io->start,
+ resource_size(io),
+ pdev->dev.driver->name) == NULL)
+ return -ENOMEM;
pdata = pdev->dev.platform_data;
if (!pdata)
- goto err_no_platformdata;
+ return -ENODEV;
- base = kmalloc(ALIGN(sizeof(struct coh901318_base), 4) +
- pdata->max_channels *
- sizeof(struct coh901318_chan),
- GFP_KERNEL);
+ base = devm_kzalloc(&pdev->dev,
+ ALIGN(sizeof(struct coh901318_base), 4) +
+ pdata->max_channels *
+ sizeof(struct coh901318_chan),
+ GFP_KERNEL);
if (!base)
- goto err_alloc_coh_dma_channels;
+ return -ENOMEM;
base->chans = ((void *)base) + ALIGN(sizeof(struct coh901318_base), 4);
- base->virtbase = ioremap(io->start, resource_size(io));
- if (!base->virtbase) {
- err = -ENOMEM;
- goto err_no_ioremap;
- }
+ base->virtbase = devm_ioremap(&pdev->dev, io->start, resource_size(io));
+ if (!base->virtbase)
+ return -ENOMEM;
base->dev = &pdev->dev;
base->platform = pdata;
@@ -1474,25 +1472,20 @@ static int __init coh901318_probe(struct platform_device *pdev)
COH901318_DEBUGFS_ASSIGN(debugfs_dma_base, base);
- platform_set_drvdata(pdev, base);
-
irq = platform_get_irq(pdev, 0);
if (irq < 0)
- goto err_no_irq;
-
- err = request_irq(irq, dma_irq_handler, IRQF_DISABLED,
- "coh901318", base);
- if (err) {
- dev_crit(&pdev->dev,
- "Cannot allocate IRQ for DMA controller!\n");
- goto err_request_irq;
- }
+ return irq;
+
+ err = devm_request_irq(&pdev->dev, irq, dma_irq_handler, IRQF_DISABLED,
+ "coh901318", base);
+ if (err)
+ return err;
err = coh901318_pool_create(&base->pool, &pdev->dev,
sizeof(struct coh901318_lli),
32);
if (err)
- goto err_pool_create;
+ return err;
/* init channels for device transfers */
coh901318_base_init(&base->dma_slave, base->platform->chans_slave,
@@ -1538,6 +1531,7 @@ static int __init coh901318_probe(struct platform_device *pdev)
if (err)
goto err_register_memcpy;
+ platform_set_drvdata(pdev, base);
dev_info(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",
(u32) base->virtbase);
@@ -1547,19 +1541,6 @@ static int __init coh901318_probe(struct platform_device *pdev)
dma_async_device_unregister(&base->dma_slave);
err_register_slave:
coh901318_pool_destroy(&base->pool);
- err_pool_create:
- free_irq(platform_get_irq(pdev, 0), base);
- err_request_irq:
- err_no_irq:
- iounmap(base->virtbase);
- err_no_ioremap:
- kfree(base);
- err_alloc_coh_dma_channels:
- err_no_platformdata:
- release_mem_region(pdev->resource->start,
- resource_size(pdev->resource));
- err_request_mem:
- err_get_resource:
return err;
}
@@ -1570,11 +1551,6 @@ static int __exit coh901318_remove(struct platform_device *pdev)
dma_async_device_unregister(&base->dma_memcpy);
dma_async_device_unregister(&base->dma_slave);
coh901318_pool_destroy(&base->pool);
- free_irq(platform_get_irq(pdev, 0), base);
- iounmap(base->virtbase);
- kfree(base);
- release_mem_region(pdev->resource->start,
- resource_size(pdev->resource));
return 0;
}
--
1.7.9.2
--
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