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dmaengine: cppi41: use managed functions devm_*() 

This makes the error handling much more simpler than open-coding
everything and in addition makes the probe function smaller an tidier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Andy Shevchenko 2017-03-16 16:18:45 +02:00 committed by Vinod Koul
parent a08f2673dd
commit 8e3ba95f41
1 changed files with 25 additions and 39 deletions
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64
drivers/dma/cppi41.c
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@ -739,21 +739,9 @@ static int cppi41_stop_chan(struct dma_chan *chan)
return 0;
}
static void cleanup_chans(struct cppi41_dd *cdd)
{
while (!list_empty(&cdd->ddev.channels)) {
struct cppi41_channel *cchan;
cchan = list_first_entry(&cdd->ddev.channels,
struct cppi41_channel, chan.device_node);
list_del(&cchan->chan.device_node);
kfree(cchan);
}
}
static int cppi41_add_chans(struct device *dev, struct cppi41_dd *cdd)
{
struct cppi41_channel *cchan;
struct cppi41_channel *cchan, *chans;
int i;
u32 n_chans = cdd->n_chans;
@ -763,10 +751,12 @@ static int cppi41_add_chans(struct device *dev, struct cppi41_dd *cdd)
*/
n_chans *= 2;
chans = devm_kcalloc(dev, n_chans, sizeof(*chans), GFP_KERNEL);
if (!chans)
return -ENOMEM;
for (i = 0; i < n_chans; i++) {
cchan = kzalloc(sizeof(*cchan), GFP_KERNEL);
if (!cchan)
goto err;
cchan = &chans[i];
cchan->cdd = cdd;
if (i & 1) {
@ -786,9 +776,6 @@ static int cppi41_add_chans(struct device *dev, struct cppi41_dd *cdd)
cdd->first_td_desc = n_chans;
return 0;
err:
cleanup_chans(cdd);
return -ENOMEM;
}
static void purge_descs(struct device *dev, struct cppi41_dd *cdd)
@ -1018,6 +1005,7 @@ static int cppi41_dma_probe(struct platform_device *pdev)
struct cppi41_dd *cdd;
struct device *dev = &pdev->dev;
const struct cppi_glue_infos *glue_info;
struct resource *mem;
int index;
int irq;
int ret;
@ -1050,18 +1038,26 @@ static int cppi41_dma_probe(struct platform_device *pdev)
if (index < 0)
return index;
cdd->ctrl_mem = of_iomap(dev->of_node, index);
cdd->sched_mem = of_iomap(dev->of_node, index + 1);
cdd->qmgr_mem = of_iomap(dev->of_node, index + 2);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
cdd->ctrl_mem = devm_ioremap_resource(dev, mem);
if (IS_ERR(cdd->ctrl_mem))
return PTR_ERR(cdd->ctrl_mem);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
cdd->sched_mem = devm_ioremap_resource(dev, mem);
if (IS_ERR(cdd->sched_mem))
return PTR_ERR(cdd->sched_mem);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 2);
cdd->qmrg_mem = devm_ioremap_resource(dev, mem);
if (IS_ERR(cdd->qmrg_mem))
return PTR_ERR(cdd->qmrg_mem);
spin_lock_init(&cdd->lock);
INIT_LIST_HEAD(&cdd->pending);
platform_set_drvdata(pdev, cdd);
if (!cdd->ctrl_mem || !cdd->sched_mem ||
!cdd->qmgr_mem)
return -ENXIO;
pm_runtime_enable(dev);
pm_runtime_set_autosuspend_delay(dev, 100);
pm_runtime_use_autosuspend(dev);
@ -1091,18 +1087,18 @@ static int cppi41_dma_probe(struct platform_device *pdev)
irq = irq_of_parse_and_map(dev->of_node, 0);
if (!irq) {
ret = -EINVAL;
goto err_irq;
goto err_chans;
}
ret = devm_request_irq(&pdev->dev, irq, cppi41_irq, IRQF_SHARED,
dev_name(dev), cdd);
if (ret)
goto err_irq;
goto err_chans;
cdd->irq = irq;
ret = dma_async_device_register(&cdd->ddev);
if (ret)
goto err_dma_reg;
goto err_chans;
ret = of_dma_controller_register(dev->of_node,
cppi41_dma_xlate, &cpp41_dma_info);
@ -1115,9 +1111,6 @@ static int cppi41_dma_probe(struct platform_device *pdev)
return 0;
err_of:
dma_async_device_unregister(&cdd->ddev);
err_dma_reg:
err_irq:
cleanup_chans(cdd);
err_chans:
deinit_cppi41(dev, cdd);
err_init_cppi:
@ -1126,9 +1119,6 @@ err_get_n_chans:
err_get_sync:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
iounmap(cdd->ctrl_mem);
iounmap(cdd->sched_mem);
iounmap(cdd->qmgr_mem);
return ret;
}
@ -1145,11 +1135,7 @@ static int cppi41_dma_remove(struct platform_device *pdev)
dma_async_device_unregister(&cdd->ddev);
devm_free_irq(&pdev->dev, cdd->irq, cdd);
cleanup_chans(cdd);
deinit_cppi41(&pdev->dev, cdd);
iounmap(cdd->ctrl_mem);
iounmap(cdd->sched_mem);
iounmap(cdd->qmgr_mem);
pm_runtime_dont_use_autosuspend(&pdev->dev);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);