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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-23 16:52:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-23 16:52:15 -0700 |
| commit | 037430078fbbb956a9bd6ada00f528e9d1e4c92c (patch) | |
| tree | 6bfba945b97c1381361aeae9c8396a6e5cfa49a5 /drivers/dma/mv_xor.c | |
| parent | 1ee1ceafb572f1a925809168267a7962a4289de8 (diff) | |
| parent | c1f43dd9c20d85e66c4d77e284f64ac114abe3f8 (diff) | |
Merge tag 'dmaengine-fixes-3.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine
Pull dmaengine fixes from Dan Williams:
"Two fixes for -stable:
- async_mult() sometimes maps less buffers than initially requested.
We end up freeing dmaengine_unmap_data on an invalid pool.
- mv_xor: register write ordering fix"
* tag 'dmaengine-fixes-3.15-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
dmaengine: fix dmaengine_unmap failure
dma: mv_xor: Flush descriptors before activating a channel
Diffstat (limited to 'drivers/dma/mv_xor.c')
| -rw-r--r-- | drivers/dma/mv_xor.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index 766b68ed505c..394cbc5c93e3 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -191,12 +191,10 @@ static void mv_set_mode(struct mv_xor_chan *chan, static void mv_chan_activate(struct mv_xor_chan *chan) { - u32 activation; - dev_dbg(mv_chan_to_devp(chan), " activate chan.\n"); - activation = readl_relaxed(XOR_ACTIVATION(chan)); - activation |= 0x1; - writel_relaxed(activation, XOR_ACTIVATION(chan)); + + /* writel ensures all descriptors are flushed before activation */ + writel(BIT(0), XOR_ACTIVATION(chan)); } static char mv_chan_is_busy(struct mv_xor_chan *chan) |