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drivers/dma: handle sysfs errors 

From: Jeff Garzik <jeff@garzik.org>

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Chris Leech <christopher.leech@intel.com>
hifive-unleashed-5.1
Jeff Garzik 2007-03-08 09:57:34 -08:00 committed by Dan Williams
parent 000725d56a
commit ff487fb773
1 changed files with 20 additions and 2 deletions
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22
drivers/dma/dmaengine.c
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@ -316,7 +316,7 @@ EXPORT_SYMBOL(dma_async_client_chan_request);
int dma_async_device_register(struct dma_device *device)
{
static int id;
int chancnt = 0;
int chancnt = 0, rc;
struct dma_chan* chan;
if (!device)
@ -338,8 +338,15 @@ int dma_async_device_register(struct dma_device *device)
snprintf(chan->class_dev.class_id, BUS_ID_SIZE, "dma%dchan%d",
device->dev_id, chan->chan_id);
rc = class_device_register(&chan->class_dev);
if (rc) {
chancnt--;
free_percpu(chan->local);
chan->local = NULL;
goto err_out;
}
kref_get(&device->refcount);
class_device_register(&chan->class_dev);
}
mutex_lock(&dma_list_mutex);
@ -349,6 +356,17 @@ int dma_async_device_register(struct dma_device *device)
dma_chans_rebalance();
return 0;
err_out:
list_for_each_entry(chan, &device->channels, device_node) {
if (chan->local == NULL)
continue;
kref_put(&device->refcount, dma_async_device_cleanup);
class_device_unregister(&chan->class_dev);
chancnt--;
free_percpu(chan->local);
}
return rc;
}
EXPORT_SYMBOL(dma_async_device_register);