diff options
| author | Ashutosh Dixit <ashutosh.dixit@intel.com> | 2015-12-22 19:35:23 -0800 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2016-01-06 15:16:36 +0530 |
| commit | 16605e8d50898ac88b5b504a7fbd63ecdcf37702 (patch) | |
| tree | 34a705638a21f3958d4c9ac7083993a24c097e78 | |
| parent | 168309855a7d1e16db751e9c647119fe2d2dc878 (diff) | |
| download | lwn-16605e8d50898ac88b5b504a7fbd63ecdcf37702.tar.gz lwn-16605e8d50898ac88b5b504a7fbd63ecdcf37702.zip | |
dmaengine: Revert "dmaengine: mic_x100: add missing spin_unlock"
This reverts commit e958e079e254 ("dmaengine: mic_x100: add missing
spin_unlock").
The above patch is incorrect. There is nothing wrong with the original
code. The spin_lock is acquired in the "prep" functions and released
in "submit".
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -rw-r--r-- | drivers/dma/mic_x100_dma.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/dma/mic_x100_dma.c b/drivers/dma/mic_x100_dma.c index cddfa8dbf4bd..068e920ecb68 100644 --- a/drivers/dma/mic_x100_dma.c +++ b/drivers/dma/mic_x100_dma.c @@ -317,7 +317,6 @@ mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t dma_dest, struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch); struct device *dev = mic_dma_ch_to_device(mic_ch); int result; - struct dma_async_tx_descriptor *tx = NULL; if (!len && !flags) return NULL; @@ -325,13 +324,10 @@ mic_dma_prep_memcpy_lock(struct dma_chan *ch, dma_addr_t dma_dest, spin_lock(&mic_ch->prep_lock); result = mic_dma_do_dma(mic_ch, flags, dma_src, dma_dest, len); if (result >= 0) - tx = allocate_tx(mic_ch); - - if (!tx) - dev_err(dev, "Error enqueueing dma, error=%d\n", result); - + return allocate_tx(mic_ch); + dev_err(dev, "Error enqueueing dma, error=%d\n", result); spin_unlock(&mic_ch->prep_lock); - return tx; + return NULL; } static struct dma_async_tx_descriptor * @@ -339,14 +335,13 @@ mic_dma_prep_interrupt_lock(struct dma_chan *ch, unsigned long flags) { struct mic_dma_chan *mic_ch = to_mic_dma_chan(ch); int ret; - struct dma_async_tx_descriptor *tx = NULL; spin_lock(&mic_ch->prep_lock); ret = mic_dma_do_dma(mic_ch, flags, 0, 0, 0); if (!ret) - tx = allocate_tx(mic_ch); + return allocate_tx(mic_ch); spin_unlock(&mic_ch->prep_lock); - return tx; + return NULL; } /* Return the status of the transaction */ |