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dmaengine: fix error codes in channel_register() 

The error codes were not set on some of these error paths.

Also the error handling was more confusing than it needed to be so I
cleaned it up and shuffled it around a bit.

Fixes: d2fb0a0438 ("dmaengine: break out channel registration")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201113101631.GE168908@mwanda
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dan Carpenter 2020-11-13 13:16:31 +03:00 committed by Vinod Koul
parent e773ca7da8
commit 7e4be1290a
1 changed files with 9 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/dma/dmaengine.c
View File

@ -1039,16 +1039,15 @@ static int get_dma_id(struct dma_device *device)
static int __dma_async_device_channel_register(struct dma_device *device,
struct dma_chan *chan)
{
int rc = 0;
int rc;
chan->local = alloc_percpu(typeof(*chan->local));
if (!chan->local)
goto err_out;
return -ENOMEM;
chan->dev = kzalloc(sizeof(*chan->dev), GFP_KERNEL);
if (!chan->dev) {
free_percpu(chan->local);
chan->local = NULL;
goto err_out;
rc = -ENOMEM;
goto err_free_local;
}
/*
@ -1061,7 +1060,8 @@ static int __dma_async_device_channel_register(struct dma_device *device,
if (chan->chan_id < 0) {
pr_err("%s: unable to alloc ida for chan: %d\n",
__func__, chan->chan_id);
goto err_out;
rc = chan->chan_id;
goto err_free_dev;
}
chan->dev->device.class = &dma_devclass;
@ -1082,9 +1082,10 @@ static int __dma_async_device_channel_register(struct dma_device *device,
mutex_lock(&device->chan_mutex);
ida_free(&device->chan_ida, chan->chan_id);
mutex_unlock(&device->chan_mutex);
err_out:
free_percpu(chan->local);
err_free_dev:
kfree(chan->dev);
err_free_local:
free_percpu(chan->local);
return rc;
}