diff options
| author |   Jeff Garzik <jeff@garzik.org> | 2007-03-08 09:57:34 -0800 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2007-07-11 15:39:03 -0700 |
| commit | ff487fb773749124550a5ad2b7fbfe0376af6f0d (patch) | |
| tree | 4162ef179d0496b8c5fa066a51cf97606e22c1be /drivers/dma | |
| parent | ioatdma: Push pending transactions to hardware more frequently (diff) | |
| download | linux-dev-ff487fb773749124550a5ad2b7fbfe0376af6f0d.tar.xz linux-dev-ff487fb773749124550a5ad2b7fbfe0376af6f0d.zip | |
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dmaengine.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 322ee2984e3d..828310d8be80 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -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); |