[PATCH 2/9] drivers/dma: handle sysfs errors

From: Chris Leech
Date: Fri Mar 02 2007 - 21:41:58 EST


From: Jeff Garzik <jeff@xxxxxxxxxx>

Signed-off-by: Jeff Garzik <jeff@xxxxxxxxxx>
Signed-off-by: Chris Leech <christopher.leech@xxxxxxxxx>
---

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 1527804..dc65773 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -312,7 +312,7 @@ void dma_async_client_chan_request(struct dma_client *client,
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)
@@ -334,8 +334,15 @@ 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);
@@ -345,6 +352,17 @@ 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;
}

/**

-
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