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>
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 322ee29..828310d 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -316,7 +316,7 @@
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 @@
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 @@
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);