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| author | Dan Williams <dan.j.williams@intel.com> | 2009-02-18 14:48:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-02-18 15:37:55 -0800 |
| commit | 287d859222e0adbc67666a6154aaf42d7d5bbb54 (patch) | |
| tree | a3e00f7b42f91c0d00f9d5a8d79414939b3c566f /drivers/dma/dmaengine.c | |
| parent | 9ccf3b5e8409927835c4d38cb2f380c9e4349e76 (diff) | |
| download | kernel_samsung_smdk4412-287d859222e0adbc67666a6154aaf42d7d5bbb54.zip kernel_samsung_smdk4412-287d859222e0adbc67666a6154aaf42d7d5bbb54.tar.gz kernel_samsung_smdk4412-287d859222e0adbc67666a6154aaf42d7d5bbb54.tar.bz2 | |
atmel-mci: fix initialization of dma slave data
The conversion of atmel-mci to dma_request_channel missed the
initialization of the channel dma_slave information. The filter_fn passed
to dma_request_channel is responsible for initializing the channel's
private data. This implementation has the additional benefit of enabling
a generic client-channel data passing mechanism.
Reviewed-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/dma/dmaengine.c')
| -rw-r--r-- | drivers/dma/dmaengine.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index a589930..280a9d2 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -518,6 +518,7 @@ struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, v dma_chan_name(chan), err); else break; + chan->private = NULL; chan = NULL; } } @@ -536,6 +537,7 @@ void dma_release_channel(struct dma_chan *chan) WARN_ONCE(chan->client_count != 1, "chan reference count %d != 1\n", chan->client_count); dma_chan_put(chan); + chan->private = NULL; mutex_unlock(&dma_list_mutex); } EXPORT_SYMBOL_GPL(dma_release_channel); |